126626621 has 12 divisors (see below), whose sum is σ = 146512800. Its totient is φ = 109054440.

The previous prime is 126626609. The next prime is 126626627.

126626621 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-126626621 is a prime.

It is a super-2 number, since 2×126626621² = 32068602291755282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126626627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25241 + ... + 29838.

It is an arithmetic number, because the mean of its divisors is an integer number (12209400).

Almost surely, 2^126626621 is an apocalyptic number.

126626621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126626621 is a deficient number, since it is larger than the sum of its proper divisors (19886179).

126626621 is a wasteful number, since it uses less digits than its factorization.

126626621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55120 (or 55109 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 126626621 is about 11252.8494613587. The cubic root of 126626621 is about 502.1594877975.

The spelling of 126626621 in words is "one hundred twenty-six million, six hundred twenty-six thousand, six hundred twenty-one".