149289121 has 4 divisors (see below), whose sum is σ = 158070852. Its totient is φ = 140507392.

The previous prime is 149289109. The next prime is 149289221. The reversal of 149289121 is 121982941.

149289121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121982941 = 641 ⋅190301.

It can be written as a sum of positive squares in 2 ways, for example, as 133726096 + 15563025 = 11564^2 + 3945^2 .

It is a cyclic number.

It is not a de Polignac number, because 149289121 - 2⁵ = 149289089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149289221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4390840 + ... + 4390873.

It is an arithmetic number, because the mean of its divisors is an integer number (39517713).

Almost surely, 2^149289121 is an apocalyptic number.

It is an amenable number.

149289121 is a deficient number, since it is larger than the sum of its proper divisors (8781731).

149289121 is an equidigital number, since it uses as much as digits as its factorization.

149289121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8781730.

The product of its digits is 10368, while the sum is 37.

The square root of 149289121 is about 12218.3927339074. The cubic root of 149289121 is about 530.4885977290.

The spelling of 149289121 in words is "one hundred forty-nine million, two hundred eighty-nine thousand, one hundred twenty-one".