1213553125 has 24 divisors (see below), whose sum is σ = 1565899776. Its totient is φ = 939450000.

The previous prime is 1213553101. The next prime is 1213553147. The reversal of 1213553125 is 5213553121.

It is not a de Polignac number, because 1213553125 - 2¹¹ = 1213551077 is a prime.

It is a super-2 number, since 2×1213553125² = 2945422374394531250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213553093 and 1213553102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90612 + ... + 103138.

It is an arithmetic number, because the mean of its divisors is an integer number (65245824).

Almost surely, 2^1213553125 is an apocalyptic number.

It is an amenable number.

1213553125 is a deficient number, since it is larger than the sum of its proper divisors (352346651).

1213553125 is an frugal number, since it uses more digits than its factorization.

1213553125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12583 (or 12563 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 1213553125 is about 34836.0894045242. The cubic root of 1213553125 is about 1066.6442527300.

The spelling of 1213553125 in words is "one billion, two hundred thirteen million, five hundred fifty-three thousand, one hundred twenty-five".