861562401 has 8 divisors (see below), whose sum is σ = 1312857024. Its totient is φ = 492321360.

The previous prime is 861562399. The next prime is 861562423. The reversal of 861562401 is 104265168.

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

It is not a de Polignac number, because 861562401 - 2¹ = 861562399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (861562441) 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, 20513370 + ... + 20513411.

It is an arithmetic number, because the mean of its divisors is an integer number (164107128).

Almost surely, 2^861562401 is an apocalyptic number.

It is an amenable number.

861562401 is a deficient number, since it is larger than the sum of its proper divisors (451294623).

861562401 is a wasteful number, since it uses less digits than its factorization.

861562401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41026791.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 861562401 is about 29352.3832252170. The cubic root of 861562401 is about 951.5440821341.

The spelling of 861562401 in words is "eight hundred sixty-one million, five hundred sixty-two thousand, four hundred one".