109721245 has 16 divisors (see below), whose sum is σ = 136931328. Its totient is φ = 84309120.

The previous prime is 109721231. The next prime is 109721273. The reversal of 109721245 is 542127901.

It is not a de Polignac number, because 109721245 - 2⁹ = 109720733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18652 + ... + 23818.

It is an arithmetic number, because the mean of its divisors is an integer number (8558208).

Almost surely, 2^109721245 is an apocalyptic number.

It is an amenable number.

109721245 is a deficient number, since it is larger than the sum of its proper divisors (27210083).

109721245 is a wasteful number, since it uses less digits than its factorization.

109721245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5340.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 109721245 is about 10474.7909287012. The cubic root of 109721245 is about 478.7369062947.

The spelling of 109721245 in words is "one hundred nine million, seven hundred twenty-one thousand, two hundred forty-five".