1249253895 has 32 divisors (see below), whose sum is σ = 2106374400. Its totient is φ = 630491904.

The previous prime is 1249253893. The next prime is 1249253897. The reversal of 1249253895 is 5983529421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1249253893) and next prime (1249253897).

It is not a de Polignac number, because 1249253895 - 2¹ = 1249253893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249253893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329571 + ... + 333339.

It is an arithmetic number, because the mean of its divisors is an integer number (65824200).

Almost surely, 2^1249253895 is an apocalyptic number.

1249253895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1249253895 is a deficient number, since it is larger than the sum of its proper divisors (857120505).

1249253895 is a wasteful number, since it uses less digits than its factorization.

1249253895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959.

The product of its digits is 777600, while the sum is 48.

The square root of 1249253895 is about 35344.7859662497. The cubic root of 1249253895 is about 1077.0029777602.

The spelling of 1249253895 in words is "one billion, two hundred forty-nine million, two hundred fifty-three thousand, eight hundred ninety-five".