1166146542 has 48 divisors (see below), whose sum is σ = 2777448960. Its totient is φ = 350672400.

The previous prime is 1166146523. The next prime is 1166146549. The reversal of 1166146542 is 2456416611.

1166146542 is a `hidden beast` number, since 1 + 16 + 61 + 46 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1166146497 and 1166146506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166146549) 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, 3459 + ... + 48417.

It is an arithmetic number, because the mean of its divisors is an integer number (57863520).

Almost surely, 2^1166146542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1166146542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388724480).

1166146542 is an abundant number, since it is smaller than the sum of its proper divisors (1611302418).

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

1166146542 is a wasteful number, since it uses less digits than its factorization.

1166146542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45109 (or 45106 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1166146542 is about 34148.8878589040. The cubic root of 1166146542 is about 1052.5701337632.

The spelling of 1166146542 in words is "one billion, one hundred sixty-six million, one hundred forty-six thousand, five hundred forty-two".