42136657 has 4 divisors (see below), whose sum is σ = 43495936. Its totient is φ = 40777380.

The previous prime is 42136651. The next prime is 42136663. The reversal of 42136657 is 75663124.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (42136651) and next prime (42136663).

It is a cyclic number.

It is not a de Polignac number, because 42136657 - 2¹⁹ = 41612369 is a prime.

It is a super-3 number, since 3×42136657³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42136651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679593 + ... + 679654.

It is an arithmetic number, because the mean of its divisors is an integer number (10873984).

Almost surely, 2^42136657 is an apocalyptic number.

It is an amenable number.

42136657 is a deficient number, since it is larger than the sum of its proper divisors (1359279).

42136657 is a wasteful number, since it uses less digits than its factorization.

42136657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359278.

The product of its digits is 30240, while the sum is 34.

The square root of 42136657 is about 6491.2754524824. The cubic root of 42136657 is about 347.9792590140.

The spelling of 42136657 in words is "forty-two million, one hundred thirty-six thousand, six hundred fifty-seven".