2501646 has 48 divisors (see below), whose sum is σ = 5953536. Its totient is φ = 698544.

The previous prime is 2501623. The next prime is 2501647. The reversal of 2501646 is 6461052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19635 + ... + 19761.

It is an arithmetic number, because the mean of its divisors is an integer number (124032).

2^2501646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2501646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2976768).

2501646 is an abundant number, since it is smaller than the sum of its proper divisors (3451890).

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

2501646 is a wasteful number, since it uses less digits than its factorization.

2501646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2501646 is about 1581.6592553392. The cubic root of 2501646 is about 135.7506605044.

Adding to 2501646 its reverse (6461052), we get a palindrome (8962698).

The spelling of 2501646 in words is "two million, five hundred one thousand, six hundred forty-six".