121542047 has 8 divisors (see below), whose sum is σ = 135412992. Its totient is φ = 108141400.

The previous prime is 121542023. The next prime is 121542059. The reversal of 121542047 is 740245121.

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

It is a cyclic number.

It is not a de Polignac number, because 121542047 - 2¹⁰ = 121541023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121542247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117029 + ... + 118062.

It is an arithmetic number, because the mean of its divisors is an integer number (16926624).

Almost surely, 2^121542047 is an apocalyptic number.

121542047 is a deficient number, since it is larger than the sum of its proper divisors (13870945).

121542047 is a wasteful number, since it uses less digits than its factorization.

121542047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235149.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 121542047 is about 11024.6109681929. The cubic root of 121542047 is about 495.3462149567.

Adding to 121542047 its reverse (740245121), we get a palindrome (861787168).

The spelling of 121542047 in words is "one hundred twenty-one million, five hundred forty-two thousand, forty-seven".