1264427213 has 12 divisors (see below), whose sum is σ = 1472272380. Its totient is φ = 1082757312.

The previous prime is 1264427209. The next prime is 1264427267. The reversal of 1264427213 is 3127244621.

It can be written as a sum of positive squares in 2 ways, for example, as 805310884 + 459116329 = 28378^2 + 21427^2 .

It is not a de Polignac number, because 1264427213 - 2² = 1264427209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1264427213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264457213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41753 + ... + 65361.

It is an arithmetic number, because the mean of its divisors is an integer number (122689365).

Almost surely, 2^1264427213 is an apocalyptic number.

It is an amenable number.

1264427213 is a deficient number, since it is larger than the sum of its proper divisors (207845167).

1264427213 is a wasteful number, since it uses less digits than its factorization.

1264427213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24716 (or 24709 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 1264427213 is about 35558.7853138996. The cubic root of 1264427213 is about 1081.3458339195.

The spelling of 1264427213 in words is "one billion, two hundred sixty-four million, four hundred twenty-seven thousand, two hundred thirteen".