1249332139 has 24 divisors (see below), whose sum is σ = 1407672000. Its totient is φ = 1107593520.

The previous prime is 1249332131. The next prime is 1249332143. The reversal of 1249332139 is 9312339421.

It is not a de Polignac number, because 1249332139 - 2³ = 1249332131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1249332098 and 1249332107.

It is not an unprimeable number, because it can be changed into a prime (1249332131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 991692 + ... + 992950.

It is an arithmetic number, because the mean of its divisors is an integer number (58653000).

Almost surely, 2^1249332139 is an apocalyptic number.

1249332139 is a deficient number, since it is larger than the sum of its proper divisors (158339861).

1249332139 is a wasteful number, since it uses less digits than its factorization.

1249332139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479 (or 1468 counting only the distinct ones).

The product of its digits is 34992, while the sum is 37.

The square root of 1249332139 is about 35345.8928165636. The cubic root of 1249332139 is about 1077.0254624508.

The spelling of 1249332139 in words is "one billion, two hundred forty-nine million, three hundred thirty-two thousand, one hundred thirty-nine".