12761490 has 64 divisors (see below), whose sum is σ = 35564544. Its totient is φ = 2870208.

The previous prime is 12761477. The next prime is 12761503. The reversal of 12761490 is 9416721.

12761490 = 403² + 404² + ... + 469².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12761477) and next prime (12761503).

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

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13617 + ... + 14523.

It is an arithmetic number, because the mean of its divisors is an integer number (555696).

Almost surely, 2^12761490 is an apocalyptic number.

12761490 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 12761490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17782272).

12761490 is an abundant number, since it is smaller than the sum of its proper divisors (22803054).

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

12761490 is a wasteful number, since it uses less digits than its factorization.

12761490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

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

The square root of 12761490 is about 3572.3227737706. The cubic root of 12761490 is about 233.6865918930.

The spelling of 12761490 in words is "twelve million, seven hundred sixty-one thousand, four hundred ninety".