42520961 has 8 divisors (see below), whose sum is σ = 51454080. Its totient is φ = 34302528.

The previous prime is 42520943. The next prime is 42520969. The reversal of 42520961 is 16902524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42520961 - 2²² = 38326657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42520969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178541 + ... + 178778.

It is an arithmetic number, because the mean of its divisors is an integer number (6431760).

Almost surely, 2^42520961 is an apocalyptic number.

It is an amenable number.

42520961 is a deficient number, since it is larger than the sum of its proper divisors (8933119).

42520961 is a wasteful number, since it uses less digits than its factorization.

42520961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357343.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 42520961 is about 6520.8098423432. The cubic root of 42520961 is about 349.0339646695.

The spelling of 42520961 in words is "forty-two million, five hundred twenty thousand, nine hundred sixty-one".