1420391 has 8 divisors (see below), whose sum is σ = 1679520. Its totient is φ = 1175328.

The previous prime is 1420373. The next prime is 1420399. The reversal of 1420391 is 1930241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1420391 - 2¹⁸ = 1158247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3296 + ... + 3701.

It is an arithmetic number, because the mean of its divisors is an integer number (209940).

2^1420391 is an apocalyptic number.

1420391 is a deficient number, since it is larger than the sum of its proper divisors (259129).

1420391 is an equidigital number, since it uses as much as digits as its factorization.

1420391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7033.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1420391 is about 1191.8015774448. The cubic root of 1420391 is about 112.4094019567.

The spelling of 1420391 in words is "one million, four hundred twenty thousand, three hundred ninety-one".