1253402135 has 8 divisors (see below), whose sum is σ = 1569477600. Its totient is φ = 959125024.

The previous prime is 1253402113. The next prime is 1253402147. The reversal of 1253402135 is 5312043521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1253402135 - 2⁸ = 1253401879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5449460 + ... + 5449689.

It is an arithmetic number, because the mean of its divisors is an integer number (196184700).

Almost surely, 2^1253402135 is an apocalyptic number.

1253402135 is a deficient number, since it is larger than the sum of its proper divisors (316075465).

1253402135 is a wasteful number, since it uses less digits than its factorization.

1253402135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10899177.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1253402135 is about 35403.4198206896. The cubic root of 1253402135 is about 1078.1937500764.

Adding to 1253402135 its reverse (5312043521), we get a palindrome (6565445656).

The spelling of 1253402135 in words is "one billion, two hundred fifty-three million, four hundred two thousand, one hundred thirty-five".