42109827 has 16 divisors (see below), whose sum is σ = 58523040. Its totient is φ = 26899712.

The previous prime is 42109813. The next prime is 42109843. The reversal of 42109827 is 72890124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42109827 - 2⁶ = 42109763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42109897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10153 + ... + 13685.

It is an arithmetic number, because the mean of its divisors is an integer number (3657690).

Almost surely, 2^42109827 is an apocalyptic number.

42109827 is a deficient number, since it is larger than the sum of its proper divisors (16413213).

42109827 is a wasteful number, since it uses less digits than its factorization.

42109827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 42109827 is about 6489.2085033539. The cubic root of 42109827 is about 347.9053861562.

The spelling of 42109827 in words is "forty-two million, one hundred nine thousand, eight hundred twenty-seven".