12641790 has 64 divisors (see below), whose sum is σ = 35633664. Its totient is φ = 2809728.

The previous prime is 12641779. The next prime is 12641801. The reversal of 12641790 is 9714621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12641779) and next prime (12641801).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6957 + ... + 8583.

It is an arithmetic number, because the mean of its divisors is an integer number (556776).

Almost surely, 2^12641790 is an apocalyptic number.

12641790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12641790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17816832).

12641790 is an abundant number, since it is smaller than the sum of its proper divisors (22991874).

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

12641790 is a wasteful number, since it uses less digits than its factorization.

12641790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 12641790 is about 3555.5294964323. The cubic root of 12641790 is about 232.9536523579.

It can be divided in two parts, 12641 and 790, that added together give a palindrome (13431).

The spelling of 12641790 in words is "twelve million, six hundred forty-one thousand, seven hundred ninety".