12457429 has 2 divisors, whose sum is σ = 12457430. Its totient is φ = 12457428.

The previous prime is 12457427. The next prime is 12457451. The reversal of 12457429 is 92475421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 2566404 = 3145^2 + 1602^2 .

It is an emirp because it is prime and its reverse (92475421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12457429 - 2¹ = 12457427 is a prime.

Together with 12457427, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12457394 and 12457403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12457427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6228714 + 6228715.

It is an arithmetic number, because the mean of its divisors is an integer number (6228715).

Almost surely, 2^12457429 is an apocalyptic number.

It is an amenable number.

12457429 is a deficient number, since it is larger than the sum of its proper divisors (1).

12457429 is an equidigital number, since it uses as much as digits as its factorization.

12457429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 12457429 is about 3529.5083226988. The cubic root of 12457429 is about 231.8156792525.

The spelling of 12457429 in words is "twelve million, four hundred fifty-seven thousand, four hundred twenty-nine".