42389421 has 8 divisors (see below), whose sum is σ = 57293760. Its totient is φ = 27872352.

The previous prime is 42389407. The next prime is 42389423. The reversal of 42389421 is 12498324.

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

It is not a de Polignac number, because 42389421 - 2⁹ = 42388909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42389423) 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, 96561 + ... + 96998.

It is an arithmetic number, because the mean of its divisors is an integer number (7161720).

Almost surely, 2^42389421 is an apocalyptic number.

It is an amenable number.

42389421 is a deficient number, since it is larger than the sum of its proper divisors (14904339).

42389421 is a wasteful number, since it uses less digits than its factorization.

42389421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193635.

The product of its digits is 13824, while the sum is 33.

The square root of 42389421 is about 6510.7158592585. The cubic root of 42389421 is about 348.6736768529.

The spelling of 42389421 in words is "forty-two million, three hundred eighty-nine thousand, four hundred twenty-one".