245421181 has 2 divisors, whose sum is σ = 245421182. Its totient is φ = 245421180.

The previous prime is 245421131. The next prime is 245421191. The reversal of 245421181 is 181124542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127351225 + 118069956 = 11285^2 + 10866^2 .

It is a cyclic number.

It is not a de Polignac number, because 245421181 - 2⁷ = 245421053 is a prime.

It is a super-2 number, since 2×245421181² = 120463112166869522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245421101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122710590 + 122710591.

It is an arithmetic number, because the mean of its divisors is an integer number (122710591).

Almost surely, 2^245421181 is an apocalyptic number.

It is an amenable number.

245421181 is a deficient number, since it is larger than the sum of its proper divisors (1).

245421181 is an equidigital number, since it uses as much as digits as its factorization.

245421181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 28.

The square root of 245421181 is about 15665.9241987187. The cubic root of 245421181 is about 626.0908361348.

The spelling of 245421181 in words is "two hundred forty-five million, four hundred twenty-one thousand, one hundred eighty-one".