108140721 has 8 divisors (see below), whose sum is σ = 155279040. Its totient is φ = 66548112.

The previous prime is 108140719. The next prime is 108140737. The reversal of 108140721 is 127041801.

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

It is not a de Polignac number, because 108140721 - 2¹ = 108140719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 108140691 and 108140700.

It is not an unprimeable number, because it can be changed into a prime (108140701) 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, 1386381 + ... + 1386458.

It is an arithmetic number, because the mean of its divisors is an integer number (19409880).

Almost surely, 2^108140721 is an apocalyptic number.

It is an amenable number.

108140721 is a deficient number, since it is larger than the sum of its proper divisors (47138319).

108140721 is a wasteful number, since it uses less digits than its factorization.

108140721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772855.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 108140721 is about 10399.0730836936. The cubic root of 108140721 is about 476.4270597701.

The spelling of 108140721 in words is "one hundred eight million, one hundred forty thousand, seven hundred twenty-one".