42056449 has 2 divisors, whose sum is σ = 42056450. Its totient is φ = 42056448.

The previous prime is 42056423. The next prime is 42056459. The reversal of 42056449 is 94465024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 66049 = 6480^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 42056449 - 2¹³ = 42048257 is a prime.

It is not a weakly prime, because it can be changed into another prime (42056459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21028224 + 21028225.

It is an arithmetic number, because the mean of its divisors is an integer number (21028225).

Almost surely, 2^42056449 is an apocalyptic number.

It is an amenable number.

42056449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42056449 is an equidigital number, since it uses as much as digits as its factorization.

42056449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 42056449 is about 6485.0943709402. The cubic root of 42056449 is about 347.7583235254.

The spelling of 42056449 in words is "forty-two million, fifty-six thousand, four hundred forty-nine".