126642653 has 4 divisors (see below), whose sum is σ = 127124448. Its totient is φ = 126160860.

The previous prime is 126642641. The next prime is 126642667. The reversal of 126642653 is 356246621.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 356246621 = 1009 ⋅353069.

It is a cyclic number.

It is not a de Polignac number, because 126642653 - 2⁶ = 126642589 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 (126642683) 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, 240503 + ... + 241028.

It is an arithmetic number, because the mean of its divisors is an integer number (31781112).

Almost surely, 2^126642653 is an apocalyptic number.

It is an amenable number.

126642653 is a deficient number, since it is larger than the sum of its proper divisors (481795).

126642653 is an equidigital number, since it uses as much as digits as its factorization.

126642653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481794.

The product of its digits is 51840, while the sum is 35.

The square root of 126642653 is about 11253.5617917173. The cubic root of 126642653 is about 502.1806794477.

The spelling of 126642653 in words is "one hundred twenty-six million, six hundred forty-two thousand, six hundred fifty-three".