1252665149 has 8 divisors (see below), whose sum is σ = 1261776000. Its totient is φ = 1243581696.

The previous prime is 1252665137. The next prime is 1252665151. The reversal of 1252665149 is 9415662521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252665149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252665109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89804 + ... + 102810.

It is an arithmetic number, because the mean of its divisors is an integer number (157722000).

Almost surely, 2^1252665149 is an apocalyptic number.

It is an amenable number.

1252665149 is a deficient number, since it is larger than the sum of its proper divisors (9110851).

1252665149 is a wasteful number, since it uses less digits than its factorization.

1252665149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13699.

The product of its digits is 129600, while the sum is 41.

The square root of 1252665149 is about 35393.0098889597. The cubic root of 1252665149 is about 1077.9823868145.

The spelling of 1252665149 in words is "one billion, two hundred fifty-two million, six hundred sixty-five thousand, one hundred forty-nine".