1231220652 has 24 divisors (see below), whose sum is σ = 2942918832. Its totient is φ = 400396800.

The previous prime is 1231220593. The next prime is 1231220657. The reversal of 1231220652 is 2560221321.

It is a super-2 number, since 2×1231220652² = 3031808587822610208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231220657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1250749 + ... + 1251732.

It is an arithmetic number, because the mean of its divisors is an integer number (122621618).

Almost surely, 2^1231220652 is an apocalyptic number.

1231220652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231220652 is an abundant number, since it is smaller than the sum of its proper divisors (1711698180).

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

1231220652 is a wasteful number, since it uses less digits than its factorization.

1231220652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502529 (or 2502527 counting only the distinct ones).

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

The square root of 1231220652 is about 35088.7539248689. The cubic root of 1231220652 is about 1071.7955852810.

Adding to 1231220652 its reverse (2560221321), we get a palindrome (3791441973).

The spelling of 1231220652 in words is "one billion, two hundred thirty-one million, two hundred twenty thousand, six hundred fifty-two".