126530551 has 12 divisors (see below), whose sum is σ = 148233136. Its totient is φ = 105799680.

The previous prime is 126530527. The next prime is 126530611. The reversal of 126530551 is 155035621.

It is not a de Polignac number, because 126530551 - 2¹⁷ = 126399479 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126530501) 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, 6391 + ... + 17143.

Almost surely, 2^126530551 is an apocalyptic number.

126530551 is a deficient number, since it is larger than the sum of its proper divisors (21702585).

126530551 is an equidigital number, since it uses as much as digits as its factorization.

126530551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10842 (or 10801 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 126530551 is about 11248.5799548210. The cubic root of 126530551 is about 502.0324616712.

The spelling of 126530551 in words is "one hundred twenty-six million, five hundred thirty thousand, five hundred fifty-one".