1253898642 has 16 divisors (see below), whose sum is σ = 2508756192. Its totient is φ = 417806400.

The previous prime is 1253898629. The next prime is 1253898647. The reversal of 1253898642 is 2468983521.

It is a junction number, because it is equal to n+sod(n) for n = 1253898591 and 1253898600.

It is not an unprimeable number, because it can be changed into a prime (1253898647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22359 + ... + 54842.

It is an arithmetic number, because the mean of its divisors is an integer number (156797262).

Almost surely, 2^1253898642 is an apocalyptic number.

1253898642 is an abundant number, since it is smaller than the sum of its proper divisors (1254857550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1253898642 is a wasteful number, since it uses less digits than its factorization.

1253898642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79913.

The product of its digits is 829440, while the sum is 48.

The square root of 1253898642 is about 35410.4312597291. The cubic root of 1253898642 is about 1078.3360986647.

The spelling of 1253898642 in words is "one billion, two hundred fifty-three million, eight hundred ninety-eight thousand, six hundred forty-two".