1400431 has 4 divisors (see below), whose sum is σ = 1404000. Its totient is φ = 1396864.

The previous prime is 1400423. The next prime is 1400449. The reversal of 1400431 is 1340041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1400431 - 2³ = 1400423 is a prime.

It is a super-2 number, since 2×1400431² = 3922413971522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111 + ... + 2008.

It is an arithmetic number, because the mean of its divisors is an integer number (351000).

2^1400431 is an apocalyptic number.

1400431 is a deficient number, since it is larger than the sum of its proper divisors (3569).

1400431 is an equidigital number, since it uses as much as digits as its factorization.

1400431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1400431 is about 1183.3980733464. The cubic root of 1400431 is about 111.8803729097.

Adding to 1400431 its reverse (1340041), we get a palindrome (2740472).

The spelling of 1400431 in words is "one million, four hundred thousand, four hundred thirty-one".