1405420279 has 2 divisors, whose sum is σ = 1405420280. Its totient is φ = 1405420278.

The previous prime is 1405420201. The next prime is 1405420343. The reversal of 1405420279 is 9720245041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1405420279 - 2²⁷ = 1271202551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405420579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702710139 + 702710140.

It is an arithmetic number, because the mean of its divisors is an integer number (702710140).

Almost surely, 2^1405420279 is an apocalyptic number.

1405420279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405420279 is an equidigital number, since it uses as much as digits as its factorization.

1405420279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1405420279 is about 37488.9354210012. The cubic root of 1405420279 is about 1120.1307986591.

The spelling of 1405420279 in words is "one billion, four hundred five million, four hundred twenty thousand, two hundred seventy-nine".