1214565660 has 144 divisors (see below), whose sum is σ = 4593318912. Its totient is φ = 252374400.

The previous prime is 1214565641. The next prime is 1214565679. The reversal of 1214565660 is 665654121.

It is an interprime number because it is at equal distance from previous prime (1214565641) and next prime (1214565679).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 29956 + ... + 57675.

It is an arithmetic number, because the mean of its divisors is an integer number (31898048).

Almost surely, 2^1214565660 is an apocalyptic number.

1214565660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1214565660 is an abundant number, since it is smaller than the sum of its proper divisors (3378753252).

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

1214565660 is a wasteful number, since it uses less digits than its factorization.

1214565660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87664 (or 87659 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1214565660 is about 34850.6192197499. The cubic root of 1214565660 is about 1066.9408238437.

The spelling of 1214565660 in words is "one billion, two hundred fourteen million, five hundred sixty-five thousand, six hundred sixty".