42561698 has 8 divisors (see below), whose sum is σ = 65902080. Its totient is φ = 20594340.

The previous prime is 42561697. The next prime is 42561709. The reversal of 42561698 is 89616524.

It is a happy number.

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

It is a super-2 number, since 2×42561698² = 3622996273286408, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42561697) 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, 343178 + ... + 343301.

It is an arithmetic number, because the mean of its divisors is an integer number (8237760).

Almost surely, 2^42561698 is an apocalyptic number.

42561698 is a deficient number, since it is larger than the sum of its proper divisors (23340382).

42561698 is a wasteful number, since it uses less digits than its factorization.

42561698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686512.

The product of its digits is 103680, while the sum is 41.

The square root of 42561698 is about 6523.9327096468. The cubic root of 42561698 is about 349.1453925239.

The spelling of 42561698 in words is "forty-two million, five hundred sixty-one thousand, six hundred ninety-eight".