149851521 has 6 divisors (see below), whose sum is σ = 216452210. Its totient is φ = 99901008.

The previous prime is 149851519. The next prime is 149851523. The reversal of 149851521 is 125158941.

It is an interprime number because it is at equal distance from previous prime (149851519) and next prime (149851523).

It can be written as a sum of positive squares in only one way, i.e., 107744400 + 42107121 = 10380^2 + 6489^2 .

It is not a de Polignac number, because 149851521 - 2¹ = 149851519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149851523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8325076 + ... + 8325093.

Almost surely, 2^149851521 is an apocalyptic number.

It is an amenable number.

149851521 is a deficient number, since it is larger than the sum of its proper divisors (66600689).

149851521 is a wasteful number, since it uses less digits than its factorization.

149851521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16650175 (or 16650172 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 149851521 is about 12241.3855833398. The cubic root of 149851521 is about 531.1539128455.

The spelling of 149851521 in words is "one hundred forty-nine million, eight hundred fifty-one thousand, five hundred twenty-one".