42051827 has 4 divisors (see below), whose sum is σ = 43501920. Its totient is φ = 40601736.

The previous prime is 42051803. The next prime is 42051833. The reversal of 42051827 is 72815024.

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 42051827 - 2²⁰ = 41003251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1450063 = 42051827 / (4 + 2 + 0 + 5 + 1 + 8 + 2 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42051827.

It is not an unprimeable number, because it can be changed into a prime (42051847) 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, 725003 + ... + 725060.

It is an arithmetic number, because the mean of its divisors is an integer number (10875480).

Almost surely, 2^42051827 is an apocalyptic number.

42051827 is a deficient number, since it is larger than the sum of its proper divisors (1450093).

42051827 is a wasteful number, since it uses less digits than its factorization.

42051827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450092.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 42051827 is about 6484.7380055018. The cubic root of 42051827 is about 347.7455835224.

The spelling of 42051827 in words is "forty-two million, fifty-one thousand, eight hundred twenty-seven".