1971425 has 6 divisors (see below), whose sum is σ = 2444598. Its totient is φ = 1577120.

The previous prime is 1971401. The next prime is 1971427. The reversal of 1971425 is 5241791.

It can be written as a sum of positive squares in 3 ways, for example, as 30976 + 1940449 = 176^2 + 1393^2 .

It is not a de Polignac number, because 1971425 - 2¹⁰ = 1970401 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1971427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39404 + ... + 39453.

It is an arithmetic number, because the mean of its divisors is an integer number (407433).

2^1971425 is an apocalyptic number.

It is an amenable number.

1971425 is a deficient number, since it is larger than the sum of its proper divisors (473173).

1971425 is an equidigital number, since it uses as much as digits as its factorization.

1971425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78867 (or 78862 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 1971425 is about 1404.0744282267. The cubic root of 1971425 is about 125.3891870102.

The spelling of 1971425 in words is "one million, nine hundred seventy-one thousand, four hundred twenty-five".