12649537 has 2 divisors, whose sum is σ = 12649538. Its totient is φ = 12649536.

The previous prime is 12649531. The next prime is 12649561. The reversal of 12649537 is 73594621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11397376 + 1252161 = 3376^2 + 1119^2 .

It is a cyclic number.

It is not a de Polignac number, because 12649537 - 2³ = 12649529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12649496 and 12649505.

It is not a weakly prime, because it can be changed into another prime (12649531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324768 + 6324769.

It is an arithmetic number, because the mean of its divisors is an integer number (6324769).

Almost surely, 2^12649537 is an apocalyptic number.

It is an amenable number.

12649537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12649537 is an equidigital number, since it uses as much as digits as its factorization.

12649537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 12649537 is about 3556.6187594399. The cubic root of 12649537 is about 233.0012279894.

It can be divided in two parts, 1264 and 9537, that added together give a palindrome (10801).

The spelling of 12649537 in words is "twelve million, six hundred forty-nine thousand, five hundred thirty-seven".