149135081 has 8 divisors (see below), whose sum is σ = 158041800. Its totient is φ = 140479360.

The previous prime is 149135071. The next prime is 149135093. The reversal of 149135081 is 180531941.

It can be written as a sum of positive squares in 4 ways, for example, as 173056 + 148962025 = 416^2 + 12205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149135081 is a prime.

It is a super-2 number, since 2×149135081² = 44482544769753122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149135071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61526 + ... + 63903.

It is an arithmetic number, because the mean of its divisors is an integer number (19755225).

Almost surely, 2^149135081 is an apocalyptic number.

It is an amenable number.

149135081 is a deficient number, since it is larger than the sum of its proper divisors (8906719).

149135081 is a wasteful number, since it uses less digits than its factorization.

149135081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125499.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 149135081 is about 12212.0874955922. The cubic root of 149135081 is about 530.3060780991.

The spelling of 149135081 in words is "one hundred forty-nine million, one hundred thirty-five thousand, eighty-one".