1213016252 has 12 divisors (see below), whose sum is σ = 2426032560. Its totient is φ = 519864096.

The previous prime is 1213016209. The next prime is 1213016261. The reversal of 1213016252 is 2526103121.

1213016252 is an admirable number.

It is a super-2 number, since 2×1213016252² = 2942816855232255008, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 21660977 + ... + 21661032.

It is an arithmetic number, because the mean of its divisors is an integer number (202169380).

Almost surely, 2^1213016252 is an apocalyptic number.

It is an amenable number.

1213016252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1213016252 is a wasteful number, since it uses less digits than its factorization.

1213016252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43322020 (or 43322018 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1213016252 is about 34828.3828507727. The cubic root of 1213016252 is about 1066.4869359067.

Adding to 1213016252 its reverse (2526103121), we get a palindrome (3739119373).

It can be divided in two parts, 12130 and 16252, that added together give a palindrome (28382).

The spelling of 1213016252 in words is "one billion, two hundred thirteen million, sixteen thousand, two hundred fifty-two".