42921129 has 8 divisors (see below), whose sum is σ = 57735072. Its totient is φ = 28360640.

The previous prime is 42921121. The next prime is 42921139. The reversal of 42921129 is 92112924.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42921129 - 2³ = 42921121 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42921096 and 42921105.

It is not an unprimeable number, because it can be changed into a prime (42921121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62967 + ... + 63644.

It is an arithmetic number, because the mean of its divisors is an integer number (7216884).

Almost surely, 2^42921129 is an apocalyptic number.

It is an amenable number.

42921129 is a deficient number, since it is larger than the sum of its proper divisors (14813943).

42921129 is a wasteful number, since it uses less digits than its factorization.

42921129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126727.

The product of its digits is 2592, while the sum is 30.

The square root of 42921129 is about 6551.4219067314. The cubic root of 42921129 is about 350.1254760995.

The spelling of 42921129 in words is "forty-two million, nine hundred twenty-one thousand, one hundred twenty-nine".