149072281 has 2 divisors, whose sum is σ = 149072282. Its totient is φ = 149072280.

The previous prime is 149072249. The next prime is 149072317. The reversal of 149072281 is 182270941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137100681 + 11971600 = 11709^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 149072281 - 2⁵ = 149072249 is a prime.

It is a super-2 number, since 2×149072281² = 44445089925085922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (149070281) 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, 74536140 + 74536141.

It is an arithmetic number, because the mean of its divisors is an integer number (74536141).

Almost surely, 2^149072281 is an apocalyptic number.

It is an amenable number.

149072281 is a deficient number, since it is larger than the sum of its proper divisors (1).

149072281 is an equidigital number, since it uses as much as digits as its factorization.

149072281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 149072281 is about 12209.5160018733. The cubic root of 149072281 is about 530.2316312795.

The spelling of 149072281 in words is "one hundred forty-nine million, seventy-two thousand, two hundred eighty-one".