1264012642 has 16 divisors (see below), whose sum is σ = 1938424320. Its totient is φ = 617899968.

The previous prime is 1264012619. The next prime is 1264012643. The reversal of 1264012642 is 2462104621.

It is a self number, because there is not a number n which added to its sum of digits gives 1264012642.

It is not an unprimeable number, because it can be changed into a prime (1264012643) 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, 88183 + ... + 101509.

It is an arithmetic number, because the mean of its divisors is an integer number (121151520).

Almost surely, 2^1264012642 is an apocalyptic number.

1264012642 is a deficient number, since it is larger than the sum of its proper divisors (674411678).

1264012642 is a wasteful number, since it uses less digits than its factorization.

1264012642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14385.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1264012642 is about 35552.9554608334. The cubic root of 1264012642 is about 1081.2276397884.

The spelling of 1264012642 in words is "one billion, two hundred sixty-four million, twelve thousand, six hundred forty-two".