149221020 has 96 divisors (see below), whose sum is σ = 454208832. Its totient is φ = 36384768.

The previous prime is 149220997. The next prime is 149221021. The reversal of 149221020 is 20122941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149221021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87294 + ... + 88986.

It is an arithmetic number, because the mean of its divisors is an integer number (4731342).

Almost surely, 2^149221020 is an apocalyptic number.

149221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227104416).

149221020 is an abundant number, since it is smaller than the sum of its proper divisors (304987812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149221020 is a wasteful number, since it uses less digits than its factorization.

149221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831 (or 1829 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 149221020 is about 12215.6055928472. The cubic root of 149221020 is about 530.4079213912.

Adding to 149221020 its reverse (20122941), we get a palindrome (169343961).

The spelling of 149221020 in words is "one hundred forty-nine million, two hundred twenty-one thousand, twenty".