42725381 has 8 divisors (see below), whose sum is σ = 44949600. Its totient is φ = 40551280.

The previous prime is 42725351. The next prime is 42725401. The reversal of 42725381 is 18352724.

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

It is not a de Polignac number, because 42725381 - 2⁶ = 42725317 is a prime.

It is a super-2 number, since 2×42725381² = 3650916363190322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42725341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10775 + ... + 14196.

It is an arithmetic number, because the mean of its divisors is an integer number (5618700).

Almost surely, 2^42725381 is an apocalyptic number.

It is an amenable number.

42725381 is a deficient number, since it is larger than the sum of its proper divisors (2224219).

42725381 is a wasteful number, since it uses less digits than its factorization.

42725381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25059.

The product of its digits is 13440, while the sum is 32.

The square root of 42725381 is about 6536.4654822006. The cubic root of 42725381 is about 349.5923989719.

The spelling of 42725381 in words is "forty-two million, seven hundred twenty-five thousand, three hundred eighty-one".