1421320051 has 2 divisors, whose sum is σ = 1421320052. Its totient is φ = 1421320050.

The previous prime is 1421320007. The next prime is 1421320081. The reversal of 1421320051 is 1500231241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1421320051 - 2²¹ = 1419222899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421320081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710660025 + 710660026.

It is an arithmetic number, because the mean of its divisors is an integer number (710660026).

Almost surely, 2^1421320051 is an apocalyptic number.

1421320051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421320051 is an equidigital number, since it uses as much as digits as its factorization.

1421320051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1421320051 is about 37700.3985522700. The cubic root of 1421320051 is about 1124.3390490599.

Adding to 1421320051 its reverse (1500231241), we get a palindrome (2921551292).

The spelling of 1421320051 in words is "one billion, four hundred twenty-one million, three hundred twenty thousand, fifty-one".