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42199621 = 73578077
BaseRepresentation
bin1010000011111…
…0101001000101
32221101221222221
42200332221011
541300341441
64104252341
71021455652
oct240765105
987357887
1042199621
1121903222
12121710b1
138986ab9
145866c29
153a888d1
hex283ea45

42199621 has 4 divisors (see below), whose sum is σ = 42777772. Its totient is φ = 41621472.

The previous prime is 42199613. The next prime is 42199639. The reversal of 42199621 is 12699124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7918596 + 34281025 = 2814^2 + 5855^2 .

It is a cyclic number.

It is not a de Polignac number, because 42199621 - 23 = 42199613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42199601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288966 + ... + 289111.

It is an arithmetic number, because the mean of its divisors is an integer number (10694443).

Almost surely, 242199621 is an apocalyptic number.

It is an amenable number.

42199621 is a deficient number, since it is larger than the sum of its proper divisors (578151).

42199621 is an equidigital number, since it uses as much as digits as its factorization.

42199621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578150.

The product of its digits is 7776, while the sum is 34.

The square root of 42199621 is about 6496.1235363869. The cubic root of 42199621 is about 348.1524990015.

The spelling of 42199621 in words is "forty-two million, one hundred ninety-nine thousand, six hundred twenty-one".

Divisors: 1 73 578077 42199621