1296762220 has 48 divisors (see below), whose sum is σ = 2976488928. Its totient is φ = 471651840.

The previous prime is 1296762197. The next prime is 1296762253. The reversal of 1296762220 is 222676921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1296762220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19801 + ... + 54640.

It is an arithmetic number, because the mean of its divisors is an integer number (62010186).

Almost surely, 2^1296762220 is an apocalyptic number.

1296762220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296762220 is an abundant number, since it is smaller than the sum of its proper divisors (1679726708).

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

1296762220 is a wasteful number, since it uses less digits than its factorization.

1296762220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74530 (or 74528 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1296762220 is about 36010.5848327960. The cubic root of 1296762220 is about 1090.4860554241.

The spelling of 1296762220 in words is "one billion, two hundred ninety-six million, seven hundred sixty-two thousand, two hundred twenty".