12440357 has 2 divisors, whose sum is σ = 12440358. Its totient is φ = 12440356.

The previous prime is 12440339. The next prime is 12440369. The reversal of 12440357 is 75304421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 1324801 = 3334^2 + 1151^2 .

It is a cyclic number.

It is not a de Polignac number, because 12440357 - 2⁶ = 12440293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220178 + 6220179.

It is an arithmetic number, because the mean of its divisors is an integer number (6220179).

Almost surely, 2^12440357 is an apocalyptic number.

It is an amenable number.

12440357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440357 is an equidigital number, since it uses as much as digits as its factorization.

12440357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 12440357 is about 3527.0890263786. The cubic root of 12440357 is about 231.7097353347.

Adding to 12440357 its reverse (75304421), we get a palindrome (87744778).

The spelling of 12440357 in words is "twelve million, four hundred forty thousand, three hundred fifty-seven".