149215841 has 2 divisors, whose sum is σ = 149215842. Its totient is φ = 149215840.

The previous prime is 149215819. The next prime is 149215867. The reversal of 149215841 is 148512941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97318225 + 51897616 = 9865^2 + 7204^2 .

It is an emirp because it is prime and its reverse (148512941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149215841 is a prime.

It is not a weakly prime, because it can be changed into another prime (149215141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74607920 + 74607921.

It is an arithmetic number, because the mean of its divisors is an integer number (74607921).

Almost surely, 2^149215841 is an apocalyptic number.

It is an amenable number.

149215841 is a deficient number, since it is larger than the sum of its proper divisors (1).

149215841 is an equidigital number, since it uses as much as digits as its factorization.

149215841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 35.

The square root of 149215841 is about 12215.3936080668. The cubic root of 149215841 is about 530.4017850475.

The spelling of 149215841 in words is "one hundred forty-nine million, two hundred fifteen thousand, eight hundred forty-one".