126138925 has 24 divisors (see below), whose sum is σ = 171462240. Its totient is φ = 91291200.

The previous prime is 126138889. The next prime is 126138931. The reversal of 126138925 is 529831621.

It is not a de Polignac number, because 126138925 - 2⁷ = 126138797 is a prime.

It is a super-2 number, since 2×126138925² = 31822056800311250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61974 + ... + 63976.

It is an arithmetic number, because the mean of its divisors is an integer number (7144260).

Almost surely, 2^126138925 is an apocalyptic number.

It is an amenable number.

126138925 is a deficient number, since it is larger than the sum of its proper divisors (45323315).

126138925 is a wasteful number, since it uses less digits than its factorization.

126138925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253 (or 2248 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 126138925 is about 11231.1586668518. The cubic root of 126138925 is about 501.5139777822.

It can be divided in two parts, 1261 and 38925, that added together give a triangular number (40186 = T₂₈₃).

The spelling of 126138925 in words is "one hundred twenty-six million, one hundred thirty-eight thousand, nine hundred twenty-five".