42101399 has 2 divisors, whose sum is σ = 42101400. Its totient is φ = 42101398.

The previous prime is 42101377. The next prime is 42101419. The reversal of 42101399 is 99310124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42101399 - 2¹² = 42097303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42101309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21050699 + 21050700.

It is an arithmetic number, because the mean of its divisors is an integer number (21050700).

Almost surely, 2^42101399 is an apocalyptic number.

42101399 is a deficient number, since it is larger than the sum of its proper divisors (1).

42101399 is an equidigital number, since it uses as much as digits as its factorization.

42101399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 42101399 is about 6488.5590850358. The cubic root of 42101399 is about 347.8821742962.

The spelling of 42101399 in words is "forty-two million, one hundred one thousand, three hundred ninety-nine".