1253991495 has 16 divisors (see below), whose sum is σ = 2006845920. Its totient is φ = 668642304.

The previous prime is 1253991493. The next prime is 1253991517. The reversal of 1253991495 is 5941993521.

It is not a de Polignac number, because 1253991495 - 2¹ = 1253991493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253991493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94851 + ... + 107259.

It is an arithmetic number, because the mean of its divisors is an integer number (125427870).

Almost surely, 2^1253991495 is an apocalyptic number.

1253991495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1253991495 is a deficient number, since it is larger than the sum of its proper divisors (752854425).

1253991495 is a wasteful number, since it uses less digits than its factorization.

1253991495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19154.

The product of its digits is 437400, while the sum is 48.

The square root of 1253991495 is about 35411.7423321700. The cubic root of 1253991495 is about 1078.3627154546.

The spelling of 1253991495 in words is "one billion, two hundred fifty-three million, nine hundred ninety-one thousand, four hundred ninety-five".