42247449 has 6 divisors (see below), whose sum is σ = 61024106. Its totient is φ = 28164960.

The previous prime is 42247433. The next prime is 42247463. The reversal of 42247449 is 94474224.

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 257049 = 6480^2 + 507^2 .

It is not a de Polignac number, because 42247449 - 2⁴ = 42247433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42247409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2347072 + ... + 2347089.

Almost surely, 2^42247449 is an apocalyptic number.

It is an amenable number.

42247449 is a deficient number, since it is larger than the sum of its proper divisors (18776657).

42247449 is a wasteful number, since it uses less digits than its factorization.

42247449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4694167 (or 4694164 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 42247449 is about 6499.8037662686. The cubic root of 42247449 is about 348.2839784676.

The spelling of 42247449 in words is "forty-two million, two hundred forty-seven thousand, four hundred forty-nine".