2491236 has 72 divisors (see below), whose sum is σ = 7154784. Its totient is φ = 751680.

The previous prime is 2491211. The next prime is 2491243. The reversal of 2491236 is 6321942.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10576 + ... + 10808.

It is an arithmetic number, because the mean of its divisors is an integer number (99372).

2^2491236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3577392).

2491236 is an abundant number, since it is smaller than the sum of its proper divisors (4663548).

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

2491236 is a wasteful number, since it uses less digits than its factorization.

2491236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 249 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 2491236 is about 1578.3649768035. The cubic root of 2491236 is about 135.5621007719.

It can be divided in two parts, 249 and 1236, that added together give a triangular number (1485 = T₅₄).

The spelling of 2491236 in words is "two million, four hundred ninety-one thousand, two hundred thirty-six".