1372820 has 24 divisors (see below), whose sum is σ = 2921184. Its totient is φ = 541856.

The previous prime is 1372799. The next prime is 1372829. The reversal of 1372820 is 282731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1372829) 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, 1247 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (121716).

2^1372820 is an apocalyptic number.

1372820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1372820 is an abundant number, since it is smaller than the sum of its proper divisors (1548364).

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

1372820 is a wasteful number, since it uses less digits than its factorization.

1372820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1372820 is about 1171.6740160983. The cubic root of 1372820 is about 111.1402064546.

The spelling of 1372820 in words is "one million, three hundred seventy-two thousand, eight hundred twenty".