120878149 has 24 divisors (see below), whose sum is σ = 146915448. Its totient is φ = 99066240.

The previous prime is 120878141. The next prime is 120878159. The reversal of 120878149 is 941878021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44315649 + 76562500 = 6657^2 + 8750^2 .

It is not a de Polignac number, because 120878149 - 2³ = 120878141 is a prime.

It is a super-2 number, since 2×120878149² = 29223053811332402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120878141) 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 23 ways as a sum of consecutive naturals, for example, 110047 + ... + 111139.

It is an arithmetic number, because the mean of its divisors is an integer number (6121477).

Almost surely, 2^120878149 is an apocalyptic number.

It is an amenable number.

120878149 is a deficient number, since it is larger than the sum of its proper divisors (26037299).

120878149 is a wasteful number, since it uses less digits than its factorization.

120878149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205 (or 1198 counting only the distinct ones).

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

The square root of 120878149 is about 10994.4599230703. The cubic root of 120878149 is about 494.4426594427.

The spelling of 120878149 in words is "one hundred twenty million, eight hundred seventy-eight thousand, one hundred forty-nine".