149821005 has 16 divisors (see below), whose sum is σ = 243091584. Its totient is φ = 78778560.

The previous prime is 149821003. The next prime is 149821027. The reversal of 149821005 is 500128941.

It is a happy number.

149821005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 149821005 - 2¹ = 149821003 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149821003) 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, 69274 + ... + 71403.

It is an arithmetic number, because the mean of its divisors is an integer number (15193224).

Almost surely, 2^149821005 is an apocalyptic number.

149821005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

149821005 is a deficient number, since it is larger than the sum of its proper divisors (93270579).

149821005 is a wasteful number, since it uses less digits than its factorization.

149821005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140756.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 149821005 is about 12240.1390923469. The cubic root of 149821005 is about 531.1178553911.

Adding to 149821005 its reverse (500128941), we get a palindrome (649949946).

The spelling of 149821005 in words is "one hundred forty-nine million, eight hundred twenty-one thousand, five".