142557449 has 2 divisors, whose sum is σ = 142557450. Its totient is φ = 142557448.

The previous prime is 142557419. The next prime is 142557487. The reversal of 142557449 is 944755241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121000000 + 21557449 = 11000^2 + 4643^2 .

It is an emirp because it is prime and its reverse (944755241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142557449 - 2⁸ = 142557193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142557409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71278724 + 71278725.

It is an arithmetic number, because the mean of its divisors is an integer number (71278725).

Almost surely, 2^142557449 is an apocalyptic number.

It is an amenable number.

142557449 is a deficient number, since it is larger than the sum of its proper divisors (1).

142557449 is an equidigital number, since it uses as much as digits as its factorization.

142557449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 41.

The square root of 142557449 is about 11939.7424176571. The cubic root of 142557449 is about 522.3921454999.

The spelling of 142557449 in words is "one hundred forty-two million, five hundred fifty-seven thousand, four hundred forty-nine".