2491129 has 16 divisors (see below), whose sum is σ = 2833920. Its totient is φ = 2177280.

The previous prime is 2491123. The next prime is 2491171. The reversal of 2491129 is 9211942.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2491129 - 2⁷ = 2491001 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 2491097 and 2491106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491123) 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, 15202 + ... + 15364.

It is an arithmetic number, because the mean of its divisors is an integer number (177120).

2^2491129 is an apocalyptic number.

2491129 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2491129 is a deficient number, since it is larger than the sum of its proper divisors (342791).

2491129 is a wasteful number, since it uses less digits than its factorization.

2491129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240.

The product of its digits is 1296, while the sum is 28.

The square root of 2491129 is about 1578.3310806038. The cubic root of 2491129 is about 135.5601599210.

It can be divided in two parts, 249 and 1129, that added together give a triangular number (1378 = T₅₂).

The spelling of 2491129 in words is "two million, four hundred ninety-one thousand, one hundred twenty-nine".