12494821 has 2 divisors, whose sum is σ = 12494822. Its totient is φ = 12494820.

The previous prime is 12494777. The next prime is 12494831. The reversal of 12494821 is 12849421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 314721 = 3490^2 + 561^2 .

It is a cyclic number.

It is not a de Polignac number, because 12494821 - 2¹⁵ = 12462053 is a prime.

It is a super-2 number, since 2×12494821² = 312241103644082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12494831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6247410 + 6247411.

It is an arithmetic number, because the mean of its divisors is an integer number (6247411).

Almost surely, 2^12494821 is an apocalyptic number.

It is an amenable number.

12494821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12494821 is an equidigital number, since it uses as much as digits as its factorization.

12494821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 12494821 is about 3534.8014088489. The cubic root of 12494821 is about 232.0473855350.

The spelling of 12494821 in words is "twelve million, four hundred ninety-four thousand, eight hundred twenty-one".