1291572 has 24 divisors (see below), whose sum is σ = 3348800. Its totient is φ = 430488.

The previous prime is 1291567. The next prime is 1291579. The reversal of 1291572 is 2751921.

1291572 is a `hidden beast` number, since 1 + 2 + 91 + 572 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5872 + ... + 6087.

2^1291572 is an apocalyptic number.

1291572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1291572 is an abundant number, since it is smaller than the sum of its proper divisors (2057228).

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

1291572 is a wasteful number, since it uses less digits than its factorization.

1291572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11972 (or 11964 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1291572 is about 1136.4734928717. The cubic root of 1291572 is about 108.9029239780.

The spelling of 1291572 in words is "one million, two hundred ninety-one thousand, five hundred seventy-two".