42900449 has 2 divisors, whose sum is σ = 42900450. Its totient is φ = 42900448.

The previous prime is 42900433. The next prime is 42900491. The reversal of 42900449 is 94400924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40960000 + 1940449 = 6400^2 + 1393^2 .

It is a cyclic number.

It is not a de Polignac number, because 42900449 - 2⁴ = 42900433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42900409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21450224 + 21450225.

It is an arithmetic number, because the mean of its divisors is an integer number (21450225).

Almost surely, 2^42900449 is an apocalyptic number.

It is an amenable number.

42900449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42900449 is an equidigital number, since it uses as much as digits as its factorization.

42900449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 42900449 is about 6549.8434332433. The cubic root of 42900449 is about 350.0692352829.

The spelling of 42900449 in words is "forty-two million, nine hundred thousand, four hundred forty-nine".