1423256449 has 2 divisors, whose sum is σ = 1423256450. Its totient is φ = 1423256448.

The previous prime is 1423256377. The next prime is 1423256477. The reversal of 1423256449 is 9446523241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1381460224 + 41796225 = 37168^2 + 6465^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423256449 - 2²³ = 1414867841 is a prime.

It is not a weakly prime, because it can be changed into another prime (1423256489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711628224 + 711628225.

It is an arithmetic number, because the mean of its divisors is an integer number (711628225).

Almost surely, 2^1423256449 is an apocalyptic number.

It is an amenable number.

1423256449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423256449 is an equidigital number, since it uses as much as digits as its factorization.

1423256449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The square root of 1423256449 is about 37726.0712107688. The cubic root of 1423256449 is about 1124.8494149722.

The spelling of 1423256449 in words is "one billion, four hundred twenty-three million, two hundred fifty-six thousand, four hundred forty-nine".