1257880 has 64 divisors (see below), whose sum is σ = 3175200. Its totient is φ = 445440.

The previous prime is 1257877. The next prime is 1257911. The reversal of 1257880 is 887521.

It is a congruent number.

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, 21291 + ... + 21349.

2^1257880 is an apocalyptic number.

1257880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1257880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1587600).

1257880 is an abundant number, since it is smaller than the sum of its proper divisors (1917320).

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

1257880 is a wasteful number, since it uses less digits than its factorization.

1257880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1257880 is about 1121.5524954277. The cubic root of 1257880 is about 107.9476197756.

The spelling of 1257880 in words is "one million, two hundred fifty-seven thousand, eight hundred eighty".