141818321 has 2 divisors, whose sum is σ = 141818322. Its totient is φ = 141818320.

The previous prime is 141818309. The next prime is 141818329. The reversal of 141818321 is 123818141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89038096 + 52780225 = 9436^2 + 7265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-141818321 is a prime.

It is a super-2 number, since 2×141818321² = 40224872342518082, which contains 22 as substring.

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

It is not a weakly prime, because it can be changed into another prime (141818329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70909160 + 70909161.

It is an arithmetic number, because the mean of its divisors is an integer number (70909161).

Almost surely, 2^141818321 is an apocalyptic number.

It is an amenable number.

141818321 is a deficient number, since it is larger than the sum of its proper divisors (1).

141818321 is an equidigital number, since it uses as much as digits as its factorization.

141818321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 29.

The square root of 141818321 is about 11908.7497664532. The cubic root of 141818321 is about 521.4877524550.

The spelling of 141818321 in words is "one hundred forty-one million, eight hundred eighteen thousand, three hundred twenty-one".