1231456020 has 24 divisors (see below), whose sum is σ = 3448077024. Its totient is φ = 328388256.

The previous prime is 1231456019. The next prime is 1231456049. The reversal of 1231456020 is 206541321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10262074 + ... + 10262193.

It is an arithmetic number, because the mean of its divisors is an integer number (143669876).

Almost surely, 2^1231456020 is an apocalyptic number.

1231456020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231456020 is an abundant number, since it is smaller than the sum of its proper divisors (2216621004).

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

1231456020 is a wasteful number, since it uses less digits than its factorization.

1231456020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20524279 (or 20524277 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1231456020 is about 35092.1076597004. The cubic root of 1231456020 is about 1071.8638780249.

Adding to 1231456020 its reverse (206541321), we get a palindrome (1437997341).

The spelling of 1231456020 in words is "one billion, two hundred thirty-one million, four hundred fifty-six thousand, twenty".