1249942485 has 64 divisors (see below), whose sum is σ = 2281063680. Its totient is φ = 578887680.

The previous prime is 1249942483. The next prime is 1249942549. The reversal of 1249942485 is 5842499421.

It is not a de Polignac number, because 1249942485 - 2¹ = 1249942483 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249942481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 462799 + ... + 465491.

It is an arithmetic number, because the mean of its divisors is an integer number (35641620).

Almost surely, 2^1249942485 is an apocalyptic number.

1249942485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1249942485 is a deficient number, since it is larger than the sum of its proper divisors (1031121195).

1249942485 is a wasteful number, since it uses less digits than its factorization.

1249942485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838.

The product of its digits is 829440, while the sum is 48.

The square root of 1249942485 is about 35354.5256650404. The cubic root of 1249942485 is about 1077.2008231210.

The spelling of 1249942485 in words is "one billion, two hundred forty-nine million, nine hundred forty-two thousand, four hundred eighty-five".