1971432 has 32 divisors (see below), whose sum is σ = 5476800. Its totient is φ = 657072.

The previous prime is 1971427. The next prime is 1971433. The reversal of 1971432 is 2341791.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1971396 and 1971405.

It is not an unprimeable number, because it can be changed into a prime (1971433) 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, 4348 + ... + 4779.

It is an arithmetic number, because the mean of its divisors is an integer number (171150).

2^1971432 is an apocalyptic number.

1971432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1971432 is an abundant number, since it is smaller than the sum of its proper divisors (3505368).

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

1971432 is a wasteful number, since it uses less digits than its factorization.

1971432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9142 (or 9132 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1971432 is about 1404.0769209698. The cubic root of 1971432 is about 125.3893354178.

The spelling of 1971432 in words is "one million, nine hundred seventy-one thousand, four hundred thirty-two".