1591129 has 4 divisors (see below), whose sum is σ = 1628176. Its totient is φ = 1554084.

The previous prime is 1591127. The next prime is 1591141. The reversal of 1591129 is 9211951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1591129 - 2¹ = 1591127 is a prime.

It is a Duffinian number.

1591129 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1591097 and 1591106.

It is not an unprimeable number, because it can be changed into a prime (1591127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18459 + ... + 18544.

It is an arithmetic number, because the mean of its divisors is an integer number (407044).

2^1591129 is an apocalyptic number.

It is an amenable number.

1591129 is a deficient number, since it is larger than the sum of its proper divisors (37047).

1591129 is an equidigital number, since it uses as much as digits as its factorization.

1591129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37046.

The product of its digits is 810, while the sum is 28.

The square root of 1591129 is about 1261.3996194704. The cubic root of 1591129 is about 116.7441507951.

The spelling of 1591129 in words is "one million, five hundred ninety-one thousand, one hundred twenty-nine".