149226021 has 36 divisors (see below), whose sum is σ = 251608032. Its totient is φ = 84977424.

The previous prime is 149225977. The next prime is 149226029. The reversal of 149226021 is 120622941.

It is not a de Polignac number, because 149226021 - 2⁹ = 149225509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149226029) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 230320 + ... + 230966.

It is an arithmetic number, because the mean of its divisors is an integer number (6989112).

Almost surely, 2^149226021 is an apocalyptic number.

It is an amenable number.

149226021 is a deficient number, since it is larger than the sum of its proper divisors (102382011).

149226021 is a wasteful number, since it uses less digits than its factorization.

149226021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1180 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 149226021 is about 12215.8102883108. The cubic root of 149226021 is about 530.4138466967.

Adding to 149226021 its reverse (120622941), we get a palindrome (269848962).

The spelling of 149226021 in words is "one hundred forty-nine million, two hundred twenty-six thousand, twenty-one".