1264548979 has 8 divisors (see below), whose sum is σ = 1283496192. Its totient is φ = 1245633480.

The previous prime is 1264548977. The next prime is 1264549001. The reversal of 1264548979 is 9798454621.

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

It is a cyclic number.

It is not a de Polignac number, because 1264548979 - 2¹ = 1264548977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264548977) 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, 79552 + ... + 94114.

It is an arithmetic number, because the mean of its divisors is an integer number (160437024).

Almost surely, 2^1264548979 is an apocalyptic number.

1264548979 is a deficient number, since it is larger than the sum of its proper divisors (18947213).

1264548979 is a wasteful number, since it uses less digits than its factorization.

1264548979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15857.

The product of its digits is 4354560, while the sum is 55.

The square root of 1264548979 is about 35560.4974515262. The cubic root of 1264548979 is about 1081.3805444796.

The spelling of 1264548979 in words is "one billion, two hundred sixty-four million, five hundred forty-eight thousand, nine hundred seventy-nine".