1246902421 has 2 divisors, whose sum is σ = 1246902422. Its totient is φ = 1246902420.

The previous prime is 1246902353. The next prime is 1246902431. The reversal of 1246902421 is 1242096421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1013148900 + 233753521 = 31830^2 + 15289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246902421 - 2¹⁷ = 1246771349 is a prime.

It is a super-2 number, since 2×1246902421² = 3109531294991322482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1246902431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623451210 + 623451211.

It is an arithmetic number, because the mean of its divisors is an integer number (623451211).

Almost surely, 2^1246902421 is an apocalyptic number.

It is an amenable number.

1246902421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246902421 is an equidigital number, since it uses as much as digits as its factorization.

1246902421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1246902421 is about 35311.5055045802. The cubic root of 1246902421 is about 1076.3268047850.

Adding to 1246902421 its reverse (1242096421), we get a palindrome (2488998842).

The spelling of 1246902421 in words is "one billion, two hundred forty-six million, nine hundred two thousand, four hundred twenty-one".