1971020 has 24 divisors (see below), whose sum is σ = 4174800. Its totient is φ = 781632.

The previous prime is 1971007. The next prime is 1971023. The reversal of 1971020 is 201791.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1970983 and 1971001.

It is not an unprimeable number, because it can be changed into a prime (1971023) 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, 2426 + ... + 3134.

It is an arithmetic number, because the mean of its divisors is an integer number (173950).

2^1971020 is an apocalyptic number.

1971020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1971020 is an abundant number, since it is smaller than the sum of its proper divisors (2203780).

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

1971020 is a wasteful number, since it uses less digits than its factorization.

1971020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1971020 is about 1403.9301976950. The cubic root of 1971020 is about 125.3805999731.

The spelling of 1971020 in words is "one million, nine hundred seventy-one thousand, twenty".