1975431 has 4 divisors (see below), whose sum is σ = 2633912. Its totient is φ = 1316952.

The previous prime is 1975427. The next prime is 1975439. The reversal of 1975431 is 1345791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1345791 = 3 ⋅448597.

It is not a de Polignac number, because 1975431 - 2² = 1975427 is a prime.

It is a super-2 number, since 2×1975431² = 7804655271522, which contains 22 as substring.

It is a D-number.

It is the 1406-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1975439) by changing a digit.

It is a nontrivial repunit in base 1405.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329236 + ... + 329241.

It is an arithmetic number, because the mean of its divisors is an integer number (658478).

2^1975431 is an apocalyptic number.

1975431 is a deficient number, since it is larger than the sum of its proper divisors (658481).

1975431 is an equidigital number, since it uses as much as digits as its factorization.

1975431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658480.

The product of its digits is 3780, while the sum is 30.

The square root of 1975431 is about 1405.5002668089. The cubic root of 1975431 is about 125.4740611884.

The spelling of 1975431 in words is "one million, nine hundred seventy-five thousand, four hundred thirty-one".