1245749913 has 12 divisors (see below), whose sum is σ = 1802863920. Its totient is φ = 828908856.

The previous prime is 1245749903. The next prime is 1245749927. The reversal of 1245749913 is 3199475421.

It is not a de Polignac number, because 1245749913 - 2¹⁸ = 1245487769 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1245749903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127623 + ... + 137036.

It is an arithmetic number, because the mean of its divisors is an integer number (150238660).

Almost surely, 2^1245749913 is an apocalyptic number.

It is an amenable number.

1245749913 is a deficient number, since it is larger than the sum of its proper divisors (557114007).

1245749913 is a wasteful number, since it uses less digits than its factorization.

1245749913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265188 (or 265185 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1245749913 is about 35295.1825749634. The cubic root of 1245749913 is about 1075.9950873981.

The spelling of 1245749913 in words is "one billion, two hundred forty-five million, seven hundred forty-nine thousand, nine hundred thirteen".