1971632 has 20 divisors (see below), whose sum is σ = 4114320. Its totient is φ = 909888.

The previous prime is 1971601. The next prime is 1971637. The reversal of 1971632 is 2361791.

It is a junction number, because it is equal to n+sod(n) for n = 1971595 and 1971604.

It is not an unprimeable number, because it can be changed into a prime (1971637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4532 + ... + 4947.

It is an arithmetic number, because the mean of its divisors is an integer number (205716).

2^1971632 is an apocalyptic number.

It is an amenable number.

1971632 is an abundant number, since it is smaller than the sum of its proper divisors (2142688).

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

1971632 is a wasteful number, since it uses less digits than its factorization.

1971632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9500 (or 9494 counting only the distinct ones).

The product of its digits is 2268, while the sum is 29.

The square root of 1971632 is about 1404.1481403328. The cubic root of 1971632 is about 125.3935754861.

The spelling of 1971632 in words is "one million, nine hundred seventy-one thousand, six hundred thirty-two".