1421318057 has 4 divisors (see below), whose sum is σ = 1425535956. Its totient is φ = 1417100160.

The previous prime is 1421318053. The next prime is 1421318069. The reversal of 1421318057 is 7508131241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 141395881 + 1279922176 = 11891^2 + 35776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421318057 - 2² = 1421318053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421318053) 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, 2108444 + ... + 2109117.

It is an arithmetic number, because the mean of its divisors is an integer number (356383989).

Almost surely, 2^1421318057 is an apocalyptic number.

It is an amenable number.

1421318057 is a deficient number, since it is larger than the sum of its proper divisors (4217899).

1421318057 is an equidigital number, since it uses as much as digits as its factorization.

1421318057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217898.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1421318057 is about 37700.3721069169. The cubic root of 1421318057 is about 1124.3385232733.

Adding to 1421318057 its reverse (7508131241), we get a palindrome (8929449298).

The spelling of 1421318057 in words is "one billion, four hundred twenty-one million, three hundred eighteen thousand, fifty-seven".