12516361 has 24 divisors (see below), whose sum is σ = 15156680. Its totient is φ = 10264320.

The previous prime is 12516341. The next prime is 12516373. The reversal of 12516361 is 16361521.

12516361 = T₃₉₃ + T₃₉₄ + ... + T₅₁₃.

It can be written as a sum of positive squares in 4 ways, for example, as 1334025 + 11182336 = 1155^2 + 3344^2 .

It is not a de Polignac number, because 12516361 - 2¹³ = 12508169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12516341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114775 + ... + 114883.

Almost surely, 2^12516361 is an apocalyptic number.

12516361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12516361 is a deficient number, since it is larger than the sum of its proper divisors (2640319).

12516361 is a wasteful number, since it uses less digits than its factorization.

12516361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 206 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 12516361 is about 3537.8469441173. The cubic root of 12516361 is about 232.1806522492.

Adding to 12516361 its reverse (16361521), we get a palindrome (28877882).

The spelling of 12516361 in words is "twelve million, five hundred sixteen thousand, three hundred sixty-one".