109072521 has 32 divisors (see below), whose sum is σ = 171216000. Its totient is φ = 68433984.

The previous prime is 109072519. The next prime is 109072531. The reversal of 109072521 is 125270901.

It is not a de Polignac number, because 109072521 - 2¹ = 109072519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109072511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88135 + ... + 89363.

It is an arithmetic number, because the mean of its divisors is an integer number (5350500).

Almost surely, 2^109072521 is an apocalyptic number.

It is an amenable number.

109072521 is a deficient number, since it is larger than the sum of its proper divisors (62143479).

109072521 is a wasteful number, since it uses less digits than its factorization.

109072521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430 (or 1424 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 109072521 is about 10443.7790574102. The cubic root of 109072521 is about 477.7915341852.

The spelling of 109072521 in words is "one hundred nine million, seventy-two thousand, five hundred twenty-one".