1956431 has 2 divisors, whose sum is σ = 1956432. Its totient is φ = 1956430.

The previous prime is 1956419. The next prime is 1956433. The reversal of 1956431 is 1346591.

It is a strong prime.

It is an emirp because it is prime and its reverse (1346591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1956431 - 2¹⁰ = 1955407 is a prime.

It is a super-2 number, since 2×1956431² = 7655244515522, which contains 22 as substring.

Together with 1956433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1956394 and 1956403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1956433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978215 + 978216.

It is an arithmetic number, because the mean of its divisors is an integer number (978216).

2^1956431 is an apocalyptic number.

1956431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956431 is an equidigital number, since it uses as much as digits as its factorization.

1956431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 1956431 is about 1398.7247763588. The cubic root of 1956431 is about 125.0704882438.

The spelling of 1956431 in words is "one million, nine hundred fifty-six thousand, four hundred thirty-one".