1591632 has 60 divisors (see below), whose sum is σ = 5093920. Its totient is φ = 454464.

The previous prime is 1591631. The next prime is 1591637. The reversal of 1591632 is 2361951.

It is a junction number, because it is equal to n+sod(n) for n = 1591596 and 1591605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1591631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219 + ... + 1797.

2^1591632 is an apocalyptic number.

1591632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1591632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2546960).

1591632 is an abundant number, since it is smaller than the sum of its proper divisors (3502288).

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

1591632 is a wasteful number, since it uses less digits than its factorization.

1591632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1591 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 1591632 is about 1261.5989854149. The cubic root of 1591632 is about 116.7564515202.

The spelling of 1591632 in words is "one million, five hundred ninety-one thousand, six hundred thirty-two".