1249137652 has 36 divisors (see below), whose sum is σ = 2560791520. Its totient is φ = 522267840.

The previous prime is 1249137647. The next prime is 1249137697. The reversal of 1249137652 is 2567319421.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33799 + ... + 60337.

Almost surely, 2^1249137652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1249137652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280395760).

1249137652 is an abundant number, since it is smaller than the sum of its proper divisors (1311653868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1249137652 is a wasteful number, since it uses less digits than its factorization.

1249137652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26632 (or 26589 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 1249137652 is about 35343.1415128876. The cubic root of 1249137652 is about 1076.9695717032.

The spelling of 1249137652 in words is "one billion, two hundred forty-nine million, one hundred thirty-seven thousand, six hundred fifty-two".