125287861 has 4 divisors (see below), whose sum is σ = 126504352. Its totient is φ = 124071372.

The previous prime is 125287849. The next prime is 125287879. The reversal of 125287861 is 168782521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125287861 - 2¹¹ = 125285813 is a prime.

It is a super-2 number, since 2×125287861² = 31394096227910642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125287061) 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, 608091 + ... + 608296.

It is an arithmetic number, because the mean of its divisors is an integer number (31626088).

Almost surely, 2^125287861 is an apocalyptic number.

It is an amenable number.

125287861 is a deficient number, since it is larger than the sum of its proper divisors (1216491).

125287861 is a wasteful number, since it uses less digits than its factorization.

125287861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216490.

The product of its digits is 53760, while the sum is 40.

The square root of 125287861 is about 11193.2060197246. The cubic root of 125287861 is about 500.3835204156.

The spelling of 125287861 in words is "one hundred twenty-five million, two hundred eighty-seven thousand, eight hundred sixty-one".