1253555420 has 48 divisors (see below), whose sum is σ = 2837993760. Its totient is φ = 462356736.

The previous prime is 1253555399. The next prime is 1253555473. The reversal of 1253555420 is 245553521.

It is a super-2 number, since 2×1253555420² = 3142802382022752800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317579 + ... + 321501.

It is an arithmetic number, because the mean of its divisors is an integer number (59124870).

Almost surely, 2^1253555420 is an apocalyptic number.

1253555420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253555420 is an abundant number, since it is smaller than the sum of its proper divisors (1584438340).

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

1253555420 is a wasteful number, since it uses less digits than its factorization.

1253555420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174 (or 5172 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 1253555420 is about 35405.5845877455. The cubic root of 1253555420 is about 1078.2377009063.

The spelling of 1253555420 in words is "one billion, two hundred fifty-three million, five hundred fifty-five thousand, four hundred twenty".