126113551 has 4 divisors (see below), whose sum is σ = 126190872. Its totient is φ = 126036232.

The previous prime is 126113543. The next prime is 126113563. The reversal of 126113551 is 155311621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 126113551 - 2³ = 126113543 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 (126111551) 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, 36160 + ... + 39493.

It is an arithmetic number, because the mean of its divisors is an integer number (31547718).

Almost surely, 2^126113551 is an apocalyptic number.

126113551 is a deficient number, since it is larger than the sum of its proper divisors (77321).

126113551 is an equidigital number, since it uses as much as digits as its factorization.

126113551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77320.

The product of its digits is 900, while the sum is 25.

The square root of 126113551 is about 11230.0289848246. The cubic root of 126113551 is about 501.4803474839.

The spelling of 126113551 in words is "one hundred twenty-six million, one hundred thirteen thousand, five hundred fifty-one".