133279542 has 24 divisors (see below), whose sum is σ = 315024840. Its totient is φ = 40387680.

The previous prime is 133279537. The next prime is 133279543. The reversal of 133279542 is 245972331.

133279542 is a `hidden beast` number, since 13 + 32 + 79 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 133279497 and 133279506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133279543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336367 + ... + 336762.

It is an arithmetic number, because the mean of its divisors is an integer number (13126035).

Almost surely, 2^133279542 is an apocalyptic number.

133279542 is an abundant number, since it is smaller than the sum of its proper divisors (181745298).

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

133279542 is a wasteful number, since it uses less digits than its factorization.

133279542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673148 (or 673145 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 133279542 is about 11544.6759157631. The cubic root of 133279542 is about 510.8042443446.

The spelling of 133279542 in words is "one hundred thirty-three million, two hundred seventy-nine thousand, five hundred forty-two".