1249938135 has 80 divisors (see below), whose sum is σ = 2393360640. Its totient is φ = 622702080.

The previous prime is 1249938133. The next prime is 1249938139. The reversal of 1249938135 is 5318399421.

It is a happy number.

It is not a de Polignac number, because 1249938135 - 2¹ = 1249938133 is a prime.

It is a super-4 number, since 4×1249938135⁴ (a number of 37 digits) contains 4444 as substring.

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

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249938133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 362379 + ... + 365811.

It is an arithmetic number, because the mean of its divisors is an integer number (29917008).

Almost surely, 2^1249938135 is an apocalyptic number.

1249938135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1249938135 is a deficient number, since it is larger than the sum of its proper divisors (1143422505).

1249938135 is a wasteful number, since it uses less digits than its factorization.

1249938135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510 (or 3501 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 1249938135 is about 35354.4641452816. The cubic root of 1249938135 is about 1077.1995735091.

The spelling of 1249938135 in words is "one billion, two hundred forty-nine million, nine hundred thirty-eight thousand, one hundred thirty-five".