125666154 has 40 divisors (see below), whose sum is σ = 283372320. Its totient is φ = 41622984.

The previous prime is 125666143. The next prime is 125666173. The reversal of 125666154 is 451666521.

It is a super-2 number, since 2×125666154² = 31583964522303432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24027 + ... + 28785.

It is an arithmetic number, because the mean of its divisors is an integer number (7084308).

Almost surely, 2^125666154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125666154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141686160).

125666154 is an abundant number, since it is smaller than the sum of its proper divisors (157706166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125666154 is a wasteful number, since it uses less digits than its factorization.

125666154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4936 (or 4927 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 125666154 is about 11210.0916142554. The cubic root of 125666154 is about 500.8866321708.

The spelling of 125666154 in words is "one hundred twenty-five million, six hundred sixty-six thousand, one hundred fifty-four".