1257215080 has 64 divisors (see below), whose sum is σ = 3157704000. Its totient is φ = 446530560.

The previous prime is 1257215077. The next prime is 1257215083. The reversal of 1257215080 is 805127521.

It is an interprime number because it is at equal distance from previous prime (1257215077) and next prime (1257215083).

It is not an unprimeable number, because it can be changed into a prime (1257215083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14305 + ... + 52144.

It is an arithmetic number, because the mean of its divisors is an integer number (49339125).

Almost surely, 2^1257215080 is an apocalyptic number.

1257215080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1257215080 is an abundant number, since it is smaller than the sum of its proper divisors (1900488920).

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

1257215080 is a wasteful number, since it uses less digits than its factorization.

1257215080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66514 (or 66510 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 1257215080 is about 35457.2288821335. The cubic root of 1257215080 is about 1079.2859592010.

The spelling of 1257215080 in words is "one billion, two hundred fifty-seven million, two hundred fifteen thousand, eighty".