18261245 has 16 divisors (see below), whose sum is σ = 22498560. Its totient is φ = 14224704.

The previous prime is 18261227. The next prime is 18261259. The reversal of 18261245 is 54216281.

It is a cyclic number.

It is not a de Polignac number, because 18261245 - 2⁶ = 18261181 is a prime.

It is a Curzon 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, 32507 + ... + 33063.

It is an arithmetic number, because the mean of its divisors is an integer number (1406160).

Almost surely, 2^18261245 is an apocalyptic number.

It is an amenable number.

18261245 is a deficient number, since it is larger than the sum of its proper divisors (4237315).

18261245 is an equidigital number, since it uses as much as digits as its factorization.

18261245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its digits is 3840, while the sum is 29.

The square root of 18261245 is about 4273.3177976837. The cubic root of 18261245 is about 263.3359352767.

The spelling of 18261245 in words is "eighteen million, two hundred sixty-one thousand, two hundred forty-five".