126154421 has 4 divisors (see below), whose sum is σ = 126186432. Its totient is φ = 126122412.

The previous prime is 126154411. The next prime is 126154447. The reversal of 126154421 is 124451621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126154421 - 2²⁶ = 59045557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126154411) 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, 9101 + ... + 18306.

It is an arithmetic number, because the mean of its divisors is an integer number (31546608).

Almost surely, 2^126154421 is an apocalyptic number.

It is an amenable number.

126154421 is a deficient number, since it is larger than the sum of its proper divisors (32011).

126154421 is an equidigital number, since it uses as much as digits as its factorization.

126154421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32010.

The product of its digits is 1920, while the sum is 26.

The square root of 126154421 is about 11231.8485121551. The cubic root of 126154421 is about 501.5345137175.

The spelling of 126154421 in words is "one hundred twenty-six million, one hundred fifty-four thousand, four hundred twenty-one".