149880721 has 16 divisors (see below), whose sum is σ = 169810560. Its totient is φ = 131431680.

The previous prime is 149880677. The next prime is 149880727. The reversal of 149880721 is 127088941.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 149880721 - 2⁹ = 149880209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149880727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15900 + ... + 23506.

It is an arithmetic number, because the mean of its divisors is an integer number (10613160).

Almost surely, 2^149880721 is an apocalyptic number.

It is an amenable number.

149880721 is a deficient number, since it is larger than the sum of its proper divisors (19929839).

149880721 is a wasteful number, since it uses less digits than its factorization.

149880721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7704.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 149880721 is about 12242.5782006896. The cubic root of 149880721 is about 531.1884107424.

The spelling of 149880721 in words is "one hundred forty-nine million, eight hundred eighty thousand, seven hundred twenty-one".