1251980 has 24 divisors (see below), whose sum is σ = 2676240. Its totient is φ = 491840.

The previous prime is 1251961. The next prime is 1251983. The reversal of 1251980 is 891521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1251983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650 + ... + 1710.

It is an arithmetic number, because the mean of its divisors is an integer number (111510).

2^1251980 is an apocalyptic number.

1251980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251980 is an abundant number, since it is smaller than the sum of its proper divisors (1424260).

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

1251980 is a wasteful number, since it uses less digits than its factorization.

1251980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1251980 is about 1118.9191212952. The cubic root of 1251980 is about 107.7785815727.

The spelling of 1251980 in words is "one million, two hundred fifty-one thousand, nine hundred eighty".