12691098 has 36 divisors (see below), whose sum is σ = 31988970. Its totient is φ = 3625776.

The previous prime is 12691093. The next prime is 12691103. The reversal of 12691098 is 89019621.

It is an interprime number because it is at equal distance from previous prime (12691093) and next prime (12691103).

It can be written as a sum of positive squares in only one way, i.e., 11716929 + 974169 = 3423^2 + 987^2 .

It is a super-2 number, since 2×12691098² = 322127936891208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12691093) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 6313 + ... + 8076.

Almost surely, 2^12691098 is an apocalyptic number.

12691098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12691098 is an abundant number, since it is smaller than the sum of its proper divisors (19297872).

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

12691098 is a wasteful number, since it uses less digits than its factorization.

12691098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14411 (or 14401 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 12691098 is about 3562.4567365794. The cubic root of 12691098 is about 233.2561300140.

The spelling of 12691098 in words is "twelve million, six hundred ninety-one thousand, ninety-eight".