42049061 has 2 divisors, whose sum is σ = 42049062. Its totient is φ = 42049060.

The previous prime is 42049031. The next prime is 42049081. The reversal of 42049061 is 16094024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29757025 + 12292036 = 5455^2 + 3506^2 .

It is a cyclic number.

It is not a de Polignac number, because 42049061 - 2⁶ = 42048997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42049061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42049001) 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 as a sum of consecutive naturals, namely, 21024530 + 21024531.

It is an arithmetic number, because the mean of its divisors is an integer number (21024531).

Almost surely, 2^42049061 is an apocalyptic number.

It is an amenable number.

42049061 is a deficient number, since it is larger than the sum of its proper divisors (1).

42049061 is an equidigital number, since it uses as much as digits as its factorization.

42049061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 42049061 is about 6484.5247320062. The cubic root of 42049061 is about 347.7379589201.

Subtracting from 42049061 its sum of digits (26), we obtain a triangular number (42049035 = T₉₁₇₀).

The spelling of 42049061 in words is "forty-two million, forty-nine thousand, sixty-one".