149238081 has 24 divisors (see below), whose sum is σ = 221045760. Its totient is φ = 96991776.

The previous prime is 149238071. The next prime is 149238097. The reversal of 149238081 is 180832941.

It is not a de Polignac number, because 149238081 - 2⁶ = 149238017 is a prime.

It is a super-2 number, since 2×149238081² = 44544009641125122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149238071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66331 + ... + 68543.

It is an arithmetic number, because the mean of its divisors is an integer number (9210240).

Almost surely, 2^149238081 is an apocalyptic number.

It is an amenable number.

149238081 is a deficient number, since it is larger than the sum of its proper divisors (71807679).

149238081 is a wasteful number, since it uses less digits than its factorization.

149238081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405 (or 2402 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 149238081 is about 12216.3039009350. The cubic root of 149238081 is about 530.4281351311.

The spelling of 149238081 in words is "one hundred forty-nine million, two hundred thirty-eight thousand, eighty-one".