1230512553 has 40 divisors (see below), whose sum is σ = 1909356768. Its totient is φ = 789155136.

The previous prime is 1230512537. The next prime is 1230512567. The reversal of 1230512553 is 3552150321.

It is a happy number.

It is not a de Polignac number, because 1230512553 - 2⁴ = 1230512537 is a prime.

It is a super-2 number, since 2×1230512553² = 3028322286181155618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1230512533) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 230725 + ... + 235997.

Almost surely, 2^1230512553 is an apocalyptic number.

It is an amenable number.

1230512553 is a deficient number, since it is larger than the sum of its proper divisors (678844215).

1230512553 is an equidigital number, since it uses as much as digits as its factorization.

1230512553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395 (or 5386 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1230512553 is about 35078.6623604721. The cubic root of 1230512553 is about 1071.5900756998.

Adding to 1230512553 its reverse (3552150321), we get a palindrome (4782662874).

The spelling of 1230512553 in words is "one billion, two hundred thirty million, five hundred twelve thousand, five hundred fifty-three".