861190025 has 12 divisors (see below), whose sum is σ = 1092711312. Its totient is φ = 672929040.

The previous prime is 861190007. The next prime is 861190037. The reversal of 861190025 is 520091168.

It is not a de Polignac number, because 861190025 - 2¹² = 861185929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861189973 and 861190000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399479 + ... + 401628.

It is an arithmetic number, because the mean of its divisors is an integer number (91059276).

Almost surely, 2^861190025 is an apocalyptic number.

It is an amenable number.

861190025 is a deficient number, since it is larger than the sum of its proper divisors (231521287).

861190025 is a wasteful number, since it uses less digits than its factorization.

861190025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801160 (or 801155 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 861190025 is about 29346.0393409400. The cubic root of 861190025 is about 951.4069733808.

The spelling of 861190025 in words is "eight hundred sixty-one million, one hundred ninety thousand, twenty-five".