121605142 has 8 divisors (see below), whose sum is σ = 182478816. Its totient is φ = 60778872.

The previous prime is 121605137. The next prime is 121605193. The reversal of 121605142 is 241506121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4533 + ... + 16240.

It is an arithmetic number, because the mean of its divisors is an integer number (22809852).

Almost surely, 2^121605142 is an apocalyptic number.

121605142 is a deficient number, since it is larger than the sum of its proper divisors (60873674).

121605142 is a wasteful number, since it uses less digits than its factorization.

121605142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23702.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 121605142 is about 11027.4721491374. The cubic root of 121605142 is about 495.4319149636.

The spelling of 121605142 in words is "one hundred twenty-one million, six hundred five thousand, one hundred forty-two".