1264145642 has 16 divisors (see below), whose sum is σ = 1982664000. Its totient is φ = 603368832.

The previous prime is 1264145633. The next prime is 1264145657. The reversal of 1264145642 is 2465414621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4583 + ... + 50490.

It is an arithmetic number, because the mean of its divisors is an integer number (123916500).

Almost surely, 2^1264145642 is an apocalyptic number.

1264145642 is a deficient number, since it is larger than the sum of its proper divisors (718518358).

1264145642 is a wasteful number, since it uses less digits than its factorization.

1264145642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55597.

The product of its digits is 46080, while the sum is 35.

The square root of 1264145642 is about 35554.8258609151. The cubic root of 1264145642 is about 1081.2655608840.

The spelling of 1264145642 in words is "one billion, two hundred sixty-four million, one hundred forty-five thousand, six hundred forty-two".