42061249 has 4 divisors (see below), whose sum is σ = 42116436. Its totient is φ = 42006064.

The previous prime is 42061219. The next prime is 42061297. The reversal of 42061249 is 94216024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11458225 + 30603024 = 3385^2 + 5532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42061249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42061219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26434 + ... + 27979.

It is an arithmetic number, because the mean of its divisors is an integer number (10529109).

Almost surely, 2^42061249 is an apocalyptic number.

It is an amenable number.

42061249 is a deficient number, since it is larger than the sum of its proper divisors (55187).

42061249 is an equidigital number, since it uses as much as digits as its factorization.

42061249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55186.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 42061249 is about 6485.4644398069. The cubic root of 42061249 is about 347.7715531766.

The spelling of 42061249 in words is "forty-two million, sixty-one thousand, two hundred forty-nine".