126242621 has 4 divisors (see below), whose sum is σ = 126688992. Its totient is φ = 125796252.

The previous prime is 126242617. The next prime is 126242639.

126242621 is nontrivially palindromic in base 10.

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 126242621 - 2² = 126242617 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 (126242681) 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, 222761 + ... + 223326.

It is an arithmetic number, because the mean of its divisors is an integer number (31672248).

Almost surely, 2^126242621 is an apocalyptic number.

It is an amenable number.

126242621 is a deficient number, since it is larger than the sum of its proper divisors (446371).

126242621 is an equidigital number, since it uses as much as digits as its factorization.

126242621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446370.

The product of its digits is 2304, while the sum is 26.

The square root of 126242621 is about 11235.7741611337. The cubic root of 126242621 is about 501.6513679633.

The spelling of 126242621 in words is "one hundred twenty-six million, two hundred forty-two thousand, six hundred twenty-one".