1263642 has 16 divisors (see below), whose sum is σ = 2581632. Its totient is φ = 412160.

The previous prime is 1263631. The next prime is 1263659. The reversal of 1263642 is 2463621.

It is a super-2 number, since 2×1263642² = 3193582208328, which contains 22 as substring.

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, 1959 + ... + 2522.

It is an arithmetic number, because the mean of its divisors is an integer number (161352).

2^1263642 is an apocalyptic number.

1263642 is an abundant number, since it is smaller than the sum of its proper divisors (1317990).

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

1263642 is a wasteful number, since it uses less digits than its factorization.

1263642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533.

The product of its digits is 1728, while the sum is 24.

The square root of 1263642 is about 1124.1183211744. The cubic root of 1263642 is about 108.1121947926.

The spelling of 1263642 in words is "one million, two hundred sixty-three thousand, six hundred forty-two".