425705621 has 8 divisors (see below), whose sum is σ = 488848800. Its totient is φ = 366636240.

The previous prime is 425705617. The next prime is 425705639. The reversal of 425705621 is 126507524.

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 425705621 - 2² = 425705617 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425705221) 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, 1018226 + ... + 1018643.

It is an arithmetic number, because the mean of its divisors is an integer number (61106100).

Almost surely, 2^425705621 is an apocalyptic number.

It is an amenable number.

425705621 is a deficient number, since it is larger than the sum of its proper divisors (63143179).

425705621 is a wasteful number, since it uses less digits than its factorization.

425705621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036899.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 425705621 is about 20632.6348535518. The cubic root of 425705621 is about 752.2631615602.

The spelling of 425705621 in words is "four hundred twenty-five million, seven hundred five thousand, six hundred twenty-one".