126972091 has 8 divisors (see below), whose sum is σ = 127880000. Its totient is φ = 126067968.

The previous prime is 126972067. The next prime is 126972107. The reversal of 126972091 is 190279621.

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 126972091 - 2⁵ = 126972059 is a prime.

It is a super-2 number, since 2×126972091² = 32243823785824562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126972091.

It is not an unprimeable number, because it can be changed into a prime (126972061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101035 + ... + 102283.

It is an arithmetic number, because the mean of its divisors is an integer number (15985000).

Almost surely, 2^126972091 is an apocalyptic number.

126972091 is a deficient number, since it is larger than the sum of its proper divisors (907909).

126972091 is a wasteful number, since it uses less digits than its factorization.

126972091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 126972091 is about 11268.1893399073. The cubic root of 126972091 is about 502.6157465437.

The spelling of 126972091 in words is "one hundred twenty-six million, nine hundred seventy-two thousand, ninety-one".