149224121 has 4 divisors (see below), whose sum is σ = 150762612. Its totient is φ = 147685632.

The previous prime is 149224109. The next prime is 149224129. The reversal of 149224121 is 121422941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121422941 = 83 ⋅1462927.

It can be written as a sum of positive squares in 2 ways, for example, as 71149225 + 78074896 = 8435^2 + 8836^2 .

It is a cyclic number.

It is not a de Polignac number, because 149224121 - 2¹⁸ = 148961977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149224129) 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, 769100 + ... + 769293.

It is an arithmetic number, because the mean of its divisors is an integer number (37690653).

Almost surely, 2^149224121 is an apocalyptic number.

It is an amenable number.

149224121 is a deficient number, since it is larger than the sum of its proper divisors (1538491).

149224121 is an equidigital number, since it uses as much as digits as its factorization.

149224121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538490.

The product of its digits is 1152, while the sum is 26.

The square root of 149224121 is about 12215.7325199924. The cubic root of 149224121 is about 530.4115955464.

The spelling of 149224121 in words is "one hundred forty-nine million, two hundred twenty-four thousand, one hundred twenty-one".