1261992 has 16 divisors (see below), whose sum is σ = 3155040. Its totient is φ = 420656.

The previous prime is 1261973. The next prime is 1262011. The reversal of 1261992 is 2991621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1261973) and next prime (1262011).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26268 + ... + 26315.

It is an arithmetic number, because the mean of its divisors is an integer number (197190).

2^1261992 is an apocalyptic number.

1261992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1261992 is an abundant number, since it is smaller than the sum of its proper divisors (1893048).

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

1261992 is a wasteful number, since it uses less digits than its factorization.

1261992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52592 (or 52588 counting only the distinct ones).

The product of its digits is 1944, while the sum is 30.

The square root of 1261992 is about 1123.3841729346. The cubic root of 1261992 is about 108.0651184793.

The spelling of 1261992 in words is "one million, two hundred sixty-one thousand, nine hundred ninety-two".