126356537 has 2 divisors, whose sum is σ = 126356538. Its totient is φ = 126356536.

The previous prime is 126356519. The next prime is 126356561. The reversal of 126356537 is 735653621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77510416 + 48846121 = 8804^2 + 6989^2 .

It is a cyclic number.

It is not a de Polignac number, because 126356537 - 2⁶ = 126356473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126356537.

It is not a weakly prime, because it can be changed into another prime (126356507) 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 as a sum of consecutive naturals, namely, 63178268 + 63178269.

It is an arithmetic number, because the mean of its divisors is an integer number (63178269).

Almost surely, 2^126356537 is an apocalyptic number.

It is an amenable number.

126356537 is a deficient number, since it is larger than the sum of its proper divisors (1).

126356537 is an equidigital number, since it uses as much as digits as its factorization.

126356537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 38.

The square root of 126356537 is about 11240.8423616738. The cubic root of 126356537 is about 501.8022122573.

The spelling of 126356537 in words is "one hundred twenty-six million, three hundred fifty-six thousand, five hundred thirty-seven".