149421841 has 2 divisors, whose sum is σ = 149421842. Its totient is φ = 149421840.

The previous prime is 149421817. The next prime is 149421847. The reversal of 149421841 is 148124941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79281216 + 70140625 = 8904^2 + 8375^2 .

It is an emirp because it is prime and its reverse (148124941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149421841 - 2⁵ = 149421809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149421797 and 149421806.

It is not a weakly prime, because it can be changed into another prime (149421847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74710920 + 74710921.

It is an arithmetic number, because the mean of its divisors is an integer number (74710921).

Almost surely, 2^149421841 is an apocalyptic number.

It is an amenable number.

149421841 is a deficient number, since it is larger than the sum of its proper divisors (1).

149421841 is an equidigital number, since it uses as much as digits as its factorization.

149421841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 149421841 is about 12223.8226835962. The cubic root of 149421841 is about 530.6457549562.

The spelling of 149421841 in words is "one hundred forty-nine million, four hundred twenty-one thousand, eight hundred forty-one".