1231452520 has 32 divisors (see below), whose sum is σ = 2866314600. Its totient is φ = 475595008.

The previous prime is 1231452493. The next prime is 1231452559. The reversal of 1231452520 is 252541321.

It can be written as a sum of positive squares in 4 ways, for example, as 1084121476 + 147331044 = 32926^2 + 12138^2 .

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, 529639 + ... + 531958.

Almost surely, 2^1231452520 is an apocalyptic number.

1231452520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231452520 is an abundant number, since it is smaller than the sum of its proper divisors (1634862080).

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

1231452520 is a wasteful number, since it uses less digits than its factorization.

1231452520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061637 (or 1061633 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1231452520 is about 35092.0577909019. The cubic root of 1231452520 is about 1071.8628625530.

Adding to 1231452520 its reverse (252541321), we get a palindrome (1483993841).

The spelling of 1231452520 in words is "one billion, two hundred thirty-one million, four hundred fifty-two thousand, five hundred twenty".