42129233 has 2 divisors, whose sum is σ = 42129234. Its totient is φ = 42129232.

The previous prime is 42129229. The next prime is 42129253. The reversal of 42129233 is 33292124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22344529 + 19784704 = 4727^2 + 4448^2 .

It is a cyclic number.

It is not a de Polignac number, because 42129233 - 2² = 42129229 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42129253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21064616 + 21064617.

It is an arithmetic number, because the mean of its divisors is an integer number (21064617).

Almost surely, 2^42129233 is an apocalyptic number.

It is an amenable number.

42129233 is a deficient number, since it is larger than the sum of its proper divisors (1).

42129233 is an equidigital number, since it uses as much as digits as its factorization.

42129233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 26.

The square root of 42129233 is about 6490.7035828175. The cubic root of 42129233 is about 347.9588211503.

The spelling of 42129233 in words is "forty-two million, one hundred twenty-nine thousand, two hundred thirty-three".