133121542 has 16 divisors (see below), whose sum is σ = 209064240. Its totient is φ = 63488992.

The previous prime is 133121537. The next prime is 133121561. The reversal of 133121542 is 245121331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9013 + ... + 18640.

It is an arithmetic number, because the mean of its divisors is an integer number (13066515).

Almost surely, 2^133121542 is an apocalyptic number.

133121542 is a deficient number, since it is larger than the sum of its proper divisors (75942698).

133121542 is a wasteful number, since it uses less digits than its factorization.

133121542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27767.

The product of its digits is 720, while the sum is 22.

The square root of 133121542 is about 11537.8309053305. The cubic root of 133121542 is about 510.6023154199.

Adding to 133121542 its reverse (245121331), we get a palindrome (378242873).

The spelling of 133121542 in words is "one hundred thirty-three million, one hundred twenty-one thousand, five hundred forty-two".