1250820 has 36 divisors (see below), whose sum is σ = 3794700. Its totient is φ = 333504.

The previous prime is 1250813. The next prime is 1250831. The reversal of 1250820 is 280521.

It can be written as a sum of positive squares in 2 ways, for example, as 799236 + 451584 = 894^2 + 672^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1250793 and 1250802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3295 + ... + 3654.

2^1250820 is an apocalyptic number.

1250820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1250820 is an abundant number, since it is smaller than the sum of its proper divisors (2543880).

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

1250820 is a wasteful number, since it uses less digits than its factorization.

1250820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964 (or 6959 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1250820 is about 1118.4006437766. The cubic root of 1250820 is about 107.7452845054.

Subtracting from 1250820 its reverse (280521), we obtain a cube (970299 = 99³).

The spelling of 1250820 in words is "one million, two hundred fifty thousand, eight hundred twenty".