1263992 has 8 divisors (see below), whose sum is σ = 2370000. Its totient is φ = 631992.

The previous prime is 1263979. The next prime is 1264009. The reversal of 1263992 is 2993621.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78992 + ... + 79007.

It is an arithmetic number, because the mean of its divisors is an integer number (296250).

2^1263992 is an apocalyptic number.

It is an amenable number.

1263992 is a deficient number, since it is larger than the sum of its proper divisors (1106008).

1263992 is a wasteful number, since it uses less digits than its factorization.

1263992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158005 (or 158001 counting only the distinct ones).

The product of its digits is 5832, while the sum is 32.

The square root of 1263992 is about 1124.2739879585. The cubic root of 1263992 is about 108.1221754082.

The spelling of 1263992 in words is "one million, two hundred sixty-three thousand, nine hundred ninety-two".