1400891 has 2 divisors, whose sum is σ = 1400892. Its totient is φ = 1400890.

The previous prime is 1400887. The next prime is 1400899. The reversal of 1400891 is 1980041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1400891 - 2² = 1400887 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1400899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700445 + 700446.

It is an arithmetic number, because the mean of its divisors is an integer number (700446).

2^1400891 is an apocalyptic number.

1400891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400891 is an equidigital number, since it uses as much as digits as its factorization.

1400891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1400891 is about 1183.5924129530. The cubic root of 1400891 is about 111.8926213621.

The spelling of 1400891 in words is "one million, four hundred thousand, eight hundred ninety-one".