1975631 has 12 divisors (see below), whose sum is σ = 2399472. Its totient is φ = 1618848.

The previous prime is 1975627. The next prime is 1975651. The reversal of 1975631 is 1365791.

It is not a de Polignac number, because 1975631 - 2² = 1975627 is a prime.

It is a super-3 number, since 3×1975631³ = 23133361852440493773, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1975651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 251 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (199956).

2^1975631 is an apocalyptic number.

1975631 is a deficient number, since it is larger than the sum of its proper divisors (423841).

1975631 is a wasteful number, since it uses less digits than its factorization.

1975631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790 (or 1783 counting only the distinct ones).

The product of its digits is 5670, while the sum is 32.

The square root of 1975631 is about 1405.5714140520. The cubic root of 1975631 is about 125.4782955328.

The spelling of 1975631 in words is "one million, nine hundred seventy-five thousand, six hundred thirty-one".