1246345421 has 4 divisors (see below), whose sum is σ = 1286550144. Its totient is φ = 1206140700.

The previous prime is 1246345391. The next prime is 1246345427. The reversal of 1246345421 is 1245436421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1246345421 - 2²⁶ = 1179236557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246345427) 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, 20102315 + ... + 20102376.

It is an arithmetic number, because the mean of its divisors is an integer number (321637536).

Almost surely, 2^1246345421 is an apocalyptic number.

It is an amenable number.

1246345421 is a deficient number, since it is larger than the sum of its proper divisors (40204723).

1246345421 is an equidigital number, since it uses as much as digits as its factorization.

1246345421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40204722.

The product of its digits is 23040, while the sum is 32.

The square root of 1246345421 is about 35303.6176758133. The cubic root of 1246345421 is about 1076.1665133536.

The spelling of 1246345421 in words is "one billion, two hundred forty-six million, three hundred forty-five thousand, four hundred twenty-one".