1977425 has 24 divisors (see below), whose sum is σ = 2708160. Its totient is φ = 1425600.

The previous prime is 1977407. The next prime is 1977427. The reversal of 1977425 is 5247791.

It is not a de Polignac number, because 1977425 - 2⁶ = 1977361 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1977427) 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, 10835 + ... + 11015.

It is an arithmetic number, because the mean of its divisors is an integer number (112840).

2^1977425 is an apocalyptic number.

It is an amenable number.

1977425 is a deficient number, since it is larger than the sum of its proper divisors (730735).

1977425 is a wasteful number, since it uses less digits than its factorization.

1977425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 228 counting only the distinct ones).

The product of its digits is 17640, while the sum is 35.

The square root of 1977425 is about 1406.2094438596. The cubic root of 1977425 is about 125.5162648295.

The spelling of 1977425 in words is "one million, nine hundred seventy-seven thousand, four hundred twenty-five".