1252780 has 12 divisors (see below), whose sum is σ = 2630880. Its totient is φ = 501104.

The previous prime is 1252777. The next prime is 1252799. The reversal of 1252780 is 872521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31300 + ... + 31339.

It is an arithmetic number, because the mean of its divisors is an integer number (219240).

2^1252780 is an apocalyptic number.

1252780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252780 is an abundant number, since it is smaller than the sum of its proper divisors (1378100).

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

1252780 is a wasteful number, since it uses less digits than its factorization.

1252780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62648 (or 62646 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1252780 is about 1119.2765520639. The cubic root of 1252780 is about 107.8015330860.

The spelling of 1252780 in words is "one million, two hundred fifty-two thousand, seven hundred eighty".