1405431 has 10 divisors (see below), whose sum is σ = 2099592. Its totient is φ = 936900.

The previous prime is 1405421. The next prime is 1405451. The reversal of 1405431 is 1345041.

It is a happy number.

It is not a de Polignac number, because 1405431 - 2⁶ = 1405367 is a prime.

It is a super-2 number, since 2×1405431² = 3950472591522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405421) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8595 + ... + 8756.

2^1405431 is an apocalyptic number.

1405431 is a deficient number, since it is larger than the sum of its proper divisors (694161).

1405431 is an equidigital number, since it uses as much as digits as its factorization.

1405431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17363 (or 17354 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1405431 is about 1185.5087515493. The cubic root of 1405431 is about 112.0133646892.

The spelling of 1405431 in words is "one million, four hundred five thousand, four hundred thirty-one".