126252513 has 10 divisors (see below), whose sum is σ = 188599554. Its totient is φ = 84168288.

The previous prime is 126252499. The next prime is 126252517. The reversal of 126252513 is 315252621.

It is a happy number.

126252513 is a `hidden beast` number, since 1 + 2 + 625 + 25 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 115283169 + 10969344 = 10737^2 + 3312^2 .

It is not a de Polignac number, because 126252513 - 2¹² = 126248417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126252517) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 779256 + ... + 779417.

Almost surely, 2^126252513 is an apocalyptic number.

It is an amenable number.

126252513 is a deficient number, since it is larger than the sum of its proper divisors (62347041).

126252513 is an equidigital number, since it uses as much as digits as its factorization.

126252513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558685 (or 1558676 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 126252513 is about 11236.2143535979. The cubic root of 126252513 is about 501.6644702624.

The spelling of 126252513 in words is "one hundred twenty-six million, two hundred fifty-two thousand, five hundred thirteen".