861262525 has 6 divisors (see below), whose sum is σ = 1067965562. Its totient is φ = 689010000.

The previous prime is 861262481. The next prime is 861262529. The reversal of 861262525 is 525262168.

It can be written as a sum of positive squares in 3 ways, for example, as 4588164 + 856674361 = 2142^2 + 29269^2 .

It is not a de Polignac number, because 861262525 - 2⁷ = 861262397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861262529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17225226 + ... + 17225275.

Almost surely, 2^861262525 is an apocalyptic number.

It is an amenable number.

861262525 is a deficient number, since it is larger than the sum of its proper divisors (206703037).

861262525 is a wasteful number, since it uses less digits than its factorization.

861262525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34450511 (or 34450506 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 861262525 is about 29347.2745753332. The cubic root of 861262525 is about 951.4336709613.

The spelling of 861262525 in words is "eight hundred sixty-one million, two hundred sixty-two thousand, five hundred twenty-five".