126972505 has 16 divisors (see below), whose sum is σ = 166722624. Its totient is φ = 92063680.

The previous prime is 126972481. The next prime is 126972511. The reversal of 126972505 is 505279621.

It is a de Polignac number, because none of the positive numbers 2^k-126972505 is a prime.

It is a super-2 number, since 2×126972505² = 32244034051950050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15759 + ... + 22411.

It is an arithmetic number, because the mean of its divisors is an integer number (10420164).

Almost surely, 2^126972505 is an apocalyptic number.

It is an amenable number.

126972505 is a deficient number, since it is larger than the sum of its proper divisors (39750119).

126972505 is a wasteful number, since it uses less digits than its factorization.

126972505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7016.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 126972505 is about 11268.2077101906. The cubic root of 126972505 is about 502.6162928125.

The spelling of 126972505 in words is "one hundred twenty-six million, nine hundred seventy-two thousand, five hundred five".