1264421 has 4 divisors (see below), whose sum is σ = 1288332. Its totient is φ = 1240512.

The previous prime is 1264411. The next prime is 1264447. The reversal of 1264421 is 1244621.

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 429025 + 835396 = 655^2 + 914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1264393 and 1264402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264411) 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, 11876 + ... + 11981.

It is an arithmetic number, because the mean of its divisors is an integer number (322083).

2^1264421 is an apocalyptic number.

It is an amenable number.

1264421 is a deficient number, since it is larger than the sum of its proper divisors (23911).

1264421 is an equidigital number, since it uses as much as digits as its factorization.

1264421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23910.

The product of its digits is 384, while the sum is 20.

The square root of 1264421 is about 1124.4647615644. The cubic root of 1264421 is about 108.1344062785.

The spelling of 1264421 in words is "one million, two hundred sixty-four thousand, four hundred twenty-one".