42646957 has 4 divisors (see below), whose sum is σ = 42902496. Its totient is φ = 42391420.

The previous prime is 42646949. The next prime is 42646973. The reversal of 42646957 is 75964624.

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 a cyclic number.

It is not a de Polignac number, because 42646957 - 2³ = 42646949 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 (42646937) 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, 127519 + ... + 127852.

It is an arithmetic number, because the mean of its divisors is an integer number (10725624).

Almost surely, 2^42646957 is an apocalyptic number.

It is an amenable number.

42646957 is a deficient number, since it is larger than the sum of its proper divisors (255539).

42646957 is a wasteful number, since it uses less digits than its factorization.

42646957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255538.

The product of its digits is 362880, while the sum is 43.

The square root of 42646957 is about 6530.4637660736. The cubic root of 42646957 is about 349.3783714205.

The spelling of 42646957 in words is "forty-two million, six hundred forty-six thousand, nine hundred fifty-seven".