126537551 has 6 divisors (see below), whose sum is σ = 147196800. Its totient is φ = 108460716.

The previous prime is 126537517. The next prime is 126537557. The reversal of 126537551 is 155735621.

126537551 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 126537551 - 2²⁶ = 59428687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126537557) 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 5 ways as a sum of consecutive naturals, for example, 1291151 + ... + 1291248.

It is an arithmetic number, because the mean of its divisors is an integer number (24532800).

Almost surely, 2^126537551 is an apocalyptic number.

126537551 is a deficient number, since it is larger than the sum of its proper divisors (20659249).

126537551 is an equidigital number, since it uses as much as digits as its factorization.

126537551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582413 (or 2582406 counting only the distinct ones).

The product of its digits is 31500, while the sum is 35.

The square root of 126537551 is about 11248.8911009041. The cubic root of 126537551 is about 502.0417194155.

The spelling of 126537551 in words is "one hundred twenty-six million, five hundred thirty-seven thousand, five hundred fifty-one".