1642920 has 32 divisors (see below), whose sum is σ = 4929120. Its totient is φ = 438080.

The previous prime is 1642919. The next prime is 1642939. The reversal of 1642920 is 292461.

It is a super-2 number, since 2×1642920² = 5398372252800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6726 + ... + 6965.

It is an arithmetic number, because the mean of its divisors is an integer number (154035).

2^1642920 is an apocalyptic number.

1642920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642920 is an abundant number, since it is smaller than the sum of its proper divisors (3286200).

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

1642920 is a wasteful number, since it uses less digits than its factorization.

1642920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13705 (or 13701 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1642920 is about 1281.7644089301. The cubic root of 1642920 is about 117.9973187172.

The spelling of 1642920 in words is "one million, six hundred forty-two thousand, nine hundred twenty".