42101249 has 2 divisors, whose sum is σ = 42101250. Its totient is φ = 42101248.

The previous prime is 42101209. The next prime is 42101261. The reversal of 42101249 is 94210124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36663025 + 5438224 = 6055^2 + 2332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42101249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42101209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21050624 + 21050625.

It is an arithmetic number, because the mean of its divisors is an integer number (21050625).

Almost surely, 2^42101249 is an apocalyptic number.

It is an amenable number.

42101249 is a deficient number, since it is larger than the sum of its proper divisors (1).

42101249 is an equidigital number, since it uses as much as digits as its factorization.

42101249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 42101249 is about 6488.5475262188. The cubic root of 42101249 is about 347.8817611477.

The spelling of 42101249 in words is "forty-two million, one hundred one thousand, two hundred forty-nine".