1249536506 has 4 divisors (see below), whose sum is σ = 1874304762. Its totient is φ = 624768252.

The previous prime is 1249536413. The next prime is 1249536521. The reversal of 1249536506 is 6056359421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1230255625 + 19280881 = 35075^2 + 4391^2 .

It is a super-2 number, since 2×1249536506² = 3122682959653376072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312384125 + ... + 312384128.

Almost surely, 2^1249536506 is an apocalyptic number.

1249536506 is a deficient number, since it is larger than the sum of its proper divisors (624768256).

1249536506 is an equidigital number, since it uses as much as digits as its factorization.

1249536506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624768255.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 1249536506 is about 35348.7836565843. The cubic root of 1249536506 is about 1077.0841862161.

The spelling of 1249536506 in words is "one billion, two hundred forty-nine million, five hundred thirty-six thousand, five hundred six".