12481491 has 16 divisors (see below), whose sum is σ = 18264960. Its totient is φ = 7518720.

The previous prime is 12481463. The next prime is 12481493. The reversal of 12481491 is 19418421.

12481491 = T₆₄ + T₆₅ + ... + T₄₂₁.

It is not a de Polignac number, because 12481491 - 2¹³ = 12473299 is a prime.

It is a super-3 number, since 3×12481491³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12481493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4851 + ... + 6963.

It is an arithmetic number, because the mean of its divisors is an integer number (1141560).

Almost surely, 2^12481491 is an apocalyptic number.

12481491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12481491 is a deficient number, since it is larger than the sum of its proper divisors (5783469).

12481491 is a wasteful number, since it uses less digits than its factorization.

12481491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306.

The product of its digits is 2304, while the sum is 30.

The square root of 12481491 is about 3532.9153683608. The cubic root of 12481491 is about 231.9648368725.

The spelling of 12481491 in words is "twelve million, four hundred eighty-one thousand, four hundred ninety-one".