149008261 has 2 divisors, whose sum is σ = 149008262. Its totient is φ = 149008260.

The previous prime is 149008259. The next prime is 149008267. The reversal of 149008261 is 162800941.

It is a happy number.

149008261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133056225 + 15952036 = 11535^2 + 3994^2 .

It is a cyclic number.

It is not a de Polignac number, because 149008261 - 2¹ = 149008259 is a prime.

Together with 149008259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149008267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74504130 + 74504131.

It is an arithmetic number, because the mean of its divisors is an integer number (74504131).

Almost surely, 2^149008261 is an apocalyptic number.

It is an amenable number.

149008261 is a deficient number, since it is larger than the sum of its proper divisors (1).

149008261 is an equidigital number, since it uses as much as digits as its factorization.

149008261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 149008261 is about 12206.8939947884. The cubic root of 149008261 is about 530.1557166755.

The spelling of 149008261 in words is "one hundred forty-nine million, eight thousand, two hundred sixty-one".