1231632 has 40 divisors (see below), whose sum is σ = 3536480. Its totient is φ = 410400.

The previous prime is 1231631. The next prime is 1231663. The reversal of 1231632 is 2361321.

1231632 is a `hidden beast` number, since 1 + 2 + 31 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (1231631) 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, 994 + ... + 1857.

It is an arithmetic number, because the mean of its divisors is an integer number (88412).

2^1231632 is an apocalyptic number.

1231632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231632 is an abundant number, since it is smaller than the sum of its proper divisors (2304848).

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

1231632 is a wasteful number, since it uses less digits than its factorization.

1231632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868 (or 2856 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 1231632 is about 1109.7891691668. The cubic root of 1231632 is about 107.1914933474.

Adding to 1231632 its reverse (2361321), we get a palindrome (3592953).

The spelling of 1231632 in words is "one million, two hundred thirty-one thousand, six hundred thirty-two".