149480021 has 2 divisors, whose sum is σ = 149480022. Its totient is φ = 149480020.

The previous prime is 149480017. The next prime is 149480027. The reversal of 149480021 is 120084941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123520996 + 25959025 = 11114^2 + 5095^2 .

It is a cyclic number.

It is not a de Polignac number, because 149480021 - 2² = 149480017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149480027) 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, 74740010 + 74740011.

It is an arithmetic number, because the mean of its divisors is an integer number (74740011).

Almost surely, 2^149480021 is an apocalyptic number.

It is an amenable number.

149480021 is a deficient number, since it is larger than the sum of its proper divisors (1).

149480021 is an equidigital number, since it uses as much as digits as its factorization.

149480021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 149480021 is about 12226.2022312736. The cubic root of 149480021 is about 530.7146180793.

The spelling of 149480021 in words is "one hundred forty-nine million, four hundred eighty thousand, twenty-one".