1420251317 has 4 divisors (see below), whose sum is σ = 1420336236. Its totient is φ = 1420166400.

The previous prime is 1420251299. The next prime is 1420251337. The reversal of 1420251317 is 7131520241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1410678481 + 9572836 = 37559^2 + 3094^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420251317 - 2¹² = 1420247221 is a prime.

It is a super-2 number, since 2×1420251317² = 4034227606880468978, 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 (1420251337) 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, 8108 + ... + 53909.

It is an arithmetic number, because the mean of its divisors is an integer number (355084059).

Almost surely, 2^1420251317 is an apocalyptic number.

It is an amenable number.

1420251317 is a deficient number, since it is larger than the sum of its proper divisors (84919).

1420251317 is an equidigital number, since it uses as much as digits as its factorization.

1420251317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84918.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1420251317 is about 37686.2218456560. The cubic root of 1420251317 is about 1124.0571700952.

Adding to 1420251317 its reverse (7131520241), we get a palindrome (8551771558).

The spelling of 1420251317 in words is "one billion, four hundred twenty million, two hundred fifty-one thousand, three hundred seventeen".