126436513 has 6 divisors (see below), whose sum is σ = 147079266. Its totient is φ = 108374112.

The previous prime is 126436489. The next prime is 126436537. The reversal of 126436513 is 315634621.

It is an interprime number because it is at equal distance from previous prime (126436489) and next prime (126436537).

It can be written as a sum of positive squares in only one way, i.e., 118635664 + 7800849 = 10892^2 + 2793^2 .

It is not a de Polignac number, because 126436513 - 2⁹ = 126436001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126436573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1290120 + ... + 1290217.

It is an arithmetic number, because the mean of its divisors is an integer number (24513211).

Almost surely, 2^126436513 is an apocalyptic number.

It is an amenable number.

126436513 is a deficient number, since it is larger than the sum of its proper divisors (20642753).

126436513 is an equidigital number, since it uses as much as digits as its factorization.

126436513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580351 (or 2580344 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 126436513 is about 11244.3991835936. The cubic root of 126436513 is about 501.9080600184.

The spelling of 126436513 in words is "one hundred twenty-six million, four hundred thirty-six thousand, five hundred thirteen".