42528919 has 4 divisors (see below), whose sum is σ = 42630840. Its totient is φ = 42427000.

The previous prime is 42528907. The next prime is 42528923. The reversal of 42528919 is 91982524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42528919 - 2¹⁵ = 42496151 is a prime.

It is a super-2 number, since 2×42528919² = 3617417902617122, 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 (42528019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50332 + ... + 51169.

It is an arithmetic number, because the mean of its divisors is an integer number (10657710).

Almost surely, 2^42528919 is an apocalyptic number.

42528919 is a deficient number, since it is larger than the sum of its proper divisors (101921).

42528919 is a wasteful number, since it uses less digits than its factorization.

42528919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101920.

The product of its digits is 51840, while the sum is 40.

The square root of 42528919 is about 6521.4200140767. The cubic root of 42528919 is about 349.0557377666.

The spelling of 42528919 in words is "forty-two million, five hundred twenty-eight thousand, nine hundred nineteen".