985601251 has 4 divisors (see below), whose sum is σ = 999102712. Its totient is φ = 972099792.

The previous prime is 985601213. The next prime is 985601257. The reversal of 985601251 is 152106589.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 985601251 - 2⁹ = 985600739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 985601251.

It is not an unprimeable number, because it can be changed into a prime (985601257) 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, 6750621 + ... + 6750766.

It is an arithmetic number, because the mean of its divisors is an integer number (249775678).

Almost surely, 2^985601251 is an apocalyptic number.

985601251 is the 18126-th hex number.

985601251 is a deficient number, since it is larger than the sum of its proper divisors (13501461).

985601251 is a wasteful number, since it uses less digits than its factorization.

985601251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13501460.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 985601251 is about 31394.2869165713. The cubic root of 985601251 is about 995.1771949433.

The spelling of 985601251 in words is "nine hundred eighty-five million, six hundred one thousand, two hundred fifty-one".