1421512957 has 2 divisors, whose sum is σ = 1421512958. Its totient is φ = 1421512956.

The previous prime is 1421512909. The next prime is 1421512969. The reversal of 1421512957 is 7592151241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1172788516 + 248724441 = 34246^2 + 15771^2 .

It is an emirp because it is prime and its reverse (7592151241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421512957 - 2¹⁵ = 1421480189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421512457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710756478 + 710756479.

It is an arithmetic number, because the mean of its divisors is an integer number (710756479).

Almost surely, 2^1421512957 is an apocalyptic number.

It is an amenable number.

1421512957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421512957 is an equidigital number, since it uses as much as digits as its factorization.

1421512957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 37.

The square root of 1421512957 is about 37702.9568734337. The cubic root of 1421512957 is about 1124.3899130289.

It can be divided in two parts, 14215 and 12957, that added together give a palindrome (27172).

The spelling of 1421512957 in words is "one billion, four hundred twenty-one million, five hundred twelve thousand, nine hundred fifty-seven".