1591974 has 40 divisors (see below), whose sum is σ = 3693888. Its totient is φ = 511920.

The previous prime is 1591973. The next prime is 1591981. The reversal of 1591974 is 4791951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1591973) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4864 + ... + 5180.

2^1591974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1591974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1846944).

1591974 is an abundant number, since it is smaller than the sum of its proper divisors (2101914).

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

1591974 is a wasteful number, since it uses less digits than its factorization.

1591974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 353 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 1591974 is about 1261.7345204123. The cubic root of 1591974 is about 116.7648135550.

It can be divided in two parts, 159197 and 4, that added together give a square (159201 = 399²).

The spelling of 1591974 in words is "one million, five hundred ninety-one thousand, nine hundred seventy-four".