126255605 has 24 divisors (see below), whose sum is σ = 180555480. Its totient is φ = 84456960.

The previous prime is 126255599. The next prime is 126255629. The reversal of 126255605 is 506552621.

126255605 = 243² + 244² + ... + 732².

It can be written as a sum of positive squares in 4 ways, for example, as 18054001 + 108201604 = 4249^2 + 10402^2 .

It is not a de Polignac number, because 126255605 - 2⁶ = 126255541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3761 + ... + 16329.

It is an arithmetic number, because the mean of its divisors is an integer number (7523145).

Almost surely, 2^126255605 is an apocalyptic number.

It is an amenable number.

126255605 is a deficient number, since it is larger than the sum of its proper divisors (54299875).

126255605 is a wasteful number, since it uses less digits than its factorization.

126255605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12629 (or 12622 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 126255605 is about 11236.3519435803. The cubic root of 126255605 is about 501.6685655838.

The spelling of 126255605 in words is "one hundred twenty-six million, two hundred fifty-five thousand, six hundred five".