111070521 has 15 divisors (see below), whose sum is σ = 166061973. Its totient is φ = 73983780.

The previous prime is 111070499. The next prime is 111070549. The reversal of 111070521 is 125070111.

It is a happy number.

The square root of 111070521 is 10539.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-111070521 is a prime.

It is a super-2 number, since 2×111070521² = 24673321270422882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111070494 and 111070503.

It is not an unprimeable number, because it can be changed into a prime (111070021) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 94266 + ... + 95436.

Almost surely, 2^111070521 is an apocalyptic number.

111070521 is the 10539-th square number.

111070521 is the 5270-th centered octagonal number.

It is an amenable number.

111070521 is a deficient number, since it is larger than the sum of its proper divisors (54991452).

111070521 is an frugal number, since it uses more digits than its factorization.

111070521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The cubic root of 111070521 is about 480.6913085688.

It can be divided in two parts, 1110 and 70521, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 111070521 in words is "one hundred eleven million, seventy thousand, five hundred twenty-one".