126972287 has 8 divisors (see below), whose sum is σ = 137659200. Its totient is φ = 116416800.

The previous prime is 126972253. The next prime is 126972289. The reversal of 126972287 is 782279621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126972287 - 2¹⁰ = 126971263 is a prime.

It is a super-2 number, since 2×126972287² = 32243923332020738, 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 (126972289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30839 + ... + 34712.

It is an arithmetic number, because the mean of its divisors is an integer number (17207400).

Almost surely, 2^126972287 is an apocalyptic number.

126972287 is a deficient number, since it is larger than the sum of its proper divisors (10686913).

126972287 is a wasteful number, since it uses less digits than its factorization.

126972287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65713.

The product of its digits is 169344, while the sum is 44.

The square root of 126972287 is about 11268.1980369534. The cubic root of 126972287 is about 502.6160051638.

The spelling of 126972287 in words is "one hundred twenty-six million, nine hundred seventy-two thousand, two hundred eighty-seven".