1264521 has 8 divisors (see below), whose sum is σ = 1740544. Its totient is φ = 815760.

The previous prime is 1264499. The next prime is 1264537. The reversal of 1264521 is 1254621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1264521 - 2⁹ = 1264009 is a prime.

It is a Duffinian number.

1264521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1264541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6706 + ... + 6891.

It is an arithmetic number, because the mean of its divisors is an integer number (217568).

2^1264521 is an apocalyptic number.

It is an amenable number.

1264521 is a deficient number, since it is larger than the sum of its proper divisors (476023).

1264521 is a wasteful number, since it uses less digits than its factorization.

1264521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13631.

The product of its digits is 480, while the sum is 21.

The square root of 1264521 is about 1124.5092262850. The cubic root of 1264521 is about 108.1372568996.

The spelling of 1264521 in words is "one million, two hundred sixty-four thousand, five hundred twenty-one".