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42657697 = 57174707
BaseRepresentation
bin1010001010111…
…0011110100001
32222021020100201
42202232132201
541410021242
64122145201
71025404315
oct242563641
988236321
1042657697
11220963a5
1212352201
138ab7454
145945b45
153b294b7
hex28ae7a1

42657697 has 4 divisors (see below), whose sum is σ = 42732976. Its totient is φ = 42582420.

The previous prime is 42657691. The next prime is 42657731. The reversal of 42657697 is 79675624.

42657697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42657697 - 23 = 42657689 is a prime.

It is a super-2 number, since 2×426576972 = 3639358226687618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42657691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36783 + ... + 37924.

It is an arithmetic number, because the mean of its divisors is an integer number (10683244).

Almost surely, 242657697 is an apocalyptic number.

It is an amenable number.

42657697 is a deficient number, since it is larger than the sum of its proper divisors (75279).

42657697 is an equidigital number, since it uses as much as digits as its factorization.

42657697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75278.

The product of its digits is 635040, while the sum is 46.

The square root of 42657697 is about 6531.2860142548. The cubic root of 42657697 is about 349.4076975360.

The spelling of 42657697 in words is "forty-two million, six hundred fifty-seven thousand, six hundred ninety-seven".

Divisors: 1 571 74707 42657697