42251389 has 4 divisors (see below), whose sum is σ = 42285024. Its totient is φ = 42217756.

The previous prime is 42251387. The next prime is 42251401. The reversal of 42251389 is 98315224.

42251389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42251389 - 2¹ = 42251387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14857 + ... + 17470.

It is an arithmetic number, because the mean of its divisors is an integer number (10571256).

Almost surely, 2^42251389 is an apocalyptic number.

It is an amenable number.

42251389 is a deficient number, since it is larger than the sum of its proper divisors (33635).

42251389 is a wasteful number, since it uses less digits than its factorization.

42251389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33634.

The product of its digits is 17280, while the sum is 34.

The square root of 42251389 is about 6500.1068452757. The cubic root of 42251389 is about 348.2948051269.

The spelling of 42251389 in words is "forty-two million, two hundred fifty-one thousand, three hundred eighty-nine".