1291272 has 32 divisors (see below), whose sum is σ = 3257280. Its totient is φ = 426560.

The previous prime is 1291271. The next prime is 1291313. The reversal of 1291272 is 2721921.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1291271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3997 + ... + 4307.

It is an arithmetic number, because the mean of its divisors is an integer number (101790).

2^1291272 is an apocalyptic number.

1291272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1291272 is an abundant number, since it is smaller than the sum of its proper divisors (1966008).

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

1291272 is a wasteful number, since it uses less digits than its factorization.

1291272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 489 counting only the distinct ones).

The product of its digits is 504, while the sum is 24.

The square root of 1291272 is about 1136.3414979662. The cubic root of 1291272 is about 108.8944915130.

The spelling of 1291272 in words is "one million, two hundred ninety-one thousand, two hundred seventy-two".