8161542 has 24 divisors (see below), whose sum is σ = 18116280. Its totient is φ = 2653920.

The previous prime is 8161537. The next prime is 8161579. The reversal of 8161542 is 2451618.

8161542 is a `hidden beast` number, since 8 + 1 + 615 + 42 = 666.

It is a super-2 number, since 2×8161542² = 133221535635528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4792 + ... + 6267.

It is an arithmetic number, because the mean of its divisors is an integer number (754845).

Almost surely, 2^8161542 is an apocalyptic number.

8161542 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

8161542 is an abundant number, since it is smaller than the sum of its proper divisors (9954738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8161542 is a wasteful number, since it uses less digits than its factorization.

8161542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11108 (or 11105 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 8161542 is about 2856.8412626536. The cubic root of 8161542 is about 201.3372225857.

The spelling of 8161542 in words is "eight million, one hundred sixty-one thousand, five hundred forty-two".