1591272 has 64 divisors (see below), whose sum is σ = 4536000. Its totient is φ = 516672.

The previous prime is 1591267. The next prime is 1591273. The reversal of 1591272 is 2721951.

1591272 is a `hidden beast` number, since 1 + 591 + 2 + 72 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1591273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11379 + ... + 11517.

It is an arithmetic number, because the mean of its divisors is an integer number (70875).

2^1591272 is an apocalyptic number.

1591272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1591272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2268000).

1591272 is an abundant number, since it is smaller than the sum of its proper divisors (2944728).

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

1591272 is a wasteful number, since it uses less digits than its factorization.

1591272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 197 counting only the distinct ones).

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

The square root of 1591272 is about 1261.4563012645. The cubic root of 1591272 is about 116.7476480840.

It can be divided in two parts, 159 and 1272, that added together give a triangular number (1431 = T₅₃).

The spelling of 1591272 in words is "one million, five hundred ninety-one thousand, two hundred seventy-two".