1971725 has 24 divisors (see below), whose sum is σ = 2946240. Its totient is φ = 1278720.

The previous prime is 1971709. The next prime is 1971727. The reversal of 1971725 is 5271791.

It is not a de Polignac number, because 1971725 - 2⁴ = 1971709 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1971691 and 1971700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3029 + ... + 3621.

It is an arithmetic number, because the mean of its divisors is an integer number (122760).

2^1971725 is an apocalyptic number.

It is an amenable number.

1971725 is a deficient number, since it is larger than the sum of its proper divisors (974515).

1971725 is a wasteful number, since it uses less digits than its factorization.

1971725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 624 counting only the distinct ones).

The product of its digits is 4410, while the sum is 32.

The square root of 1971725 is about 1404.1812561062. The cubic root of 1971725 is about 125.3955470202.

The spelling of 1971725 in words is "one million, nine hundred seventy-one thousand, seven hundred twenty-five".