1591992 has 24 divisors (see below), whose sum is σ = 4311840. Its totient is φ = 530640.

The previous prime is 1591981. The next prime is 1592027. The reversal of 1591992 is 2991951.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10984 + ... + 11127.

It is an arithmetic number, because the mean of its divisors is an integer number (179660).

2^1591992 is an apocalyptic number.

1591992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1591992 is an abundant number, since it is smaller than the sum of its proper divisors (2719848).

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

1591992 is a wasteful number, since it uses less digits than its factorization.

1591992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22123 (or 22116 counting only the distinct ones).

The product of its digits is 7290, while the sum is 36.

The square root of 1591992 is about 1261.7416534299. The cubic root of 1591992 is about 116.7652536289.

It can be divided in two parts, 159199 and 2, that added together give a square (159201 = 399²).

The spelling of 1591992 in words is "one million, five hundred ninety-one thousand, nine hundred ninety-two".