1404691 has 4 divisors (see below), whose sum is σ = 1407672. Its totient is φ = 1401712.

The previous prime is 1404671. The next prime is 1404709. The reversal of 1404691 is 1964041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1404691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1404671) 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, 610 + ... + 1783.

It is an arithmetic number, because the mean of its divisors is an integer number (351918).

2^1404691 is an apocalyptic number.

1404691 is a deficient number, since it is larger than the sum of its proper divisors (2981).

1404691 is an equidigital number, since it uses as much as digits as its factorization.

1404691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1404691 is about 1185.1966081625. The cubic root of 1404691 is about 111.9937018142.

The spelling of 1404691 in words is "one million, four hundred four thousand, six hundred ninety-one".