1428431 has 2 divisors, whose sum is σ = 1428432. Its totient is φ = 1428430.

The previous prime is 1428419. The next prime is 1428473. The reversal of 1428431 is 1348241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1428431 - 2¹⁰ = 1427407 is a prime.

It is a super-2 number, since 2×1428431² = 4080830243522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1428397 and 1428406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714215 + 714216.

It is an arithmetic number, because the mean of its divisors is an integer number (714216).

2^1428431 is an apocalyptic number.

1428431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428431 is an equidigital number, since it uses as much as digits as its factorization.

1428431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 1428431 is about 1195.1698624045. The cubic root of 1428431 is about 112.6210975845.

The spelling of 1428431 in words is "one million, four hundred twenty-eight thousand, four hundred thirty-one".