126013551 has 4 divisors (see below), whose sum is σ = 168018072. Its totient is φ = 84009032.

The previous prime is 126013519. The next prime is 126013583. The reversal of 126013551 is 155310621.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (126013519) and next prime (126013583).

It is a cyclic number.

It is not a de Polignac number, because 126013551 - 2⁵ = 126013519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126013501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21002256 + ... + 21002261.

It is an arithmetic number, because the mean of its divisors is an integer number (42004518).

Almost surely, 2^126013551 is an apocalyptic number.

126013551 is a deficient number, since it is larger than the sum of its proper divisors (42004521).

126013551 is an equidigital number, since it uses as much as digits as its factorization.

126013551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42004520.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 126013551 is about 11225.5757536084. The cubic root of 126013551 is about 501.3477651274.

The spelling of 126013551 in words is "one hundred twenty-six million, thirteen thousand, five hundred fifty-one".