1263957642 has 32 divisors (see below), whose sum is σ = 2810001600. Its totient is φ = 421138224.

The previous prime is 1263957641. The next prime is 1263957647. The reversal of 1263957642 is 2467593621.

1263957642 is a `hidden beast` number, since 1 + 2 + 6 + 39 + 576 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (1263957641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194388 + ... + 200784.

It is an arithmetic number, because the mean of its divisors is an integer number (87812550).

Almost surely, 2^1263957642 is an apocalyptic number.

1263957642 is an abundant number, since it is smaller than the sum of its proper divisors (1546043958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263957642 is a wasteful number, since it uses less digits than its factorization.

1263957642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10067 (or 10061 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 1263957642 is about 35552.1819583552. The cubic root of 1263957642 is about 1081.2119573549.

The spelling of 1263957642 in words is "one billion, two hundred sixty-three million, nine hundred fifty-seven thousand, six hundred forty-two".