126641653 has 4 divisors (see below), whose sum is σ = 134091180. Its totient is φ = 119192128.

The previous prime is 126641623. The next prime is 126641659. The reversal of 126641653 is 356146621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53333809 + 73307844 = 7303^2 + 8562^2 .

It is a cyclic number.

It is not a de Polignac number, because 126641653 - 2⁵ = 126641621 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 (126641659) 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, 3724738 + ... + 3724771.

It is an arithmetic number, because the mean of its divisors is an integer number (33522795).

Almost surely, 2^126641653 is an apocalyptic number.

It is an amenable number.

126641653 is a deficient number, since it is larger than the sum of its proper divisors (7449527).

126641653 is an equidigital number, since it uses as much as digits as its factorization.

126641653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7449526.

The product of its digits is 25920, while the sum is 34.

The square root of 126641653 is about 11253.5173612520. The cubic root of 126641653 is about 502.1793576656.

The spelling of 126641653 in words is "one hundred twenty-six million, six hundred forty-one thousand, six hundred fifty-three".