42786161 has 24 divisors (see below), whose sum is σ = 50898144. Its totient is φ = 35642880.

The previous prime is 42786143. The next prime is 42786167. The reversal of 42786161 is 16168724.

It is not a de Polignac number, because 42786161 - 2¹⁰ = 42785137 is a prime.

Its product of digits (16128) is a multiple of the sum of its prime divisors (384).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42786167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136541 + ... + 136853.

It is an arithmetic number, because the mean of its divisors is an integer number (2120756).

Almost surely, 2^42786161 is an apocalyptic number.

It is an amenable number.

42786161 is a deficient number, since it is larger than the sum of its proper divisors (8111983).

42786161 is a wasteful number, since it uses less digits than its factorization.

42786161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 384 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 42786161 is about 6541.1131315702. The cubic root of 42786161 is about 349.7580940674.

The spelling of 42786161 in words is "forty-two million, seven hundred eighty-six thousand, one hundred sixty-one".