1356431 has 2 divisors, whose sum is σ = 1356432. Its totient is φ = 1356430.

The previous prime is 1356427. The next prime is 1356451. The reversal of 1356431 is 1346531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1356431 - 2² = 1356427 is a prime.

It is a super-2 number, since 2×1356431² = 3679810115522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1356397 and 1356406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678215 + 678216.

It is an arithmetic number, because the mean of its divisors is an integer number (678216).

2^1356431 is an apocalyptic number.

1356431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356431 is an equidigital number, since it uses as much as digits as its factorization.

1356431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 1356431 is about 1164.6591776138. The cubic root of 1356431 is about 110.6961633685.

The spelling of 1356431 in words is "one million, three hundred fifty-six thousand, four hundred thirty-one".