42551149 has 4 divisors (see below), whose sum is σ = 44018460. Its totient is φ = 41083840.

The previous prime is 42551143. The next prime is 42551161. The reversal of 42551149 is 94115524.

42551149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10989225 + 31561924 = 3315^2 + 5618^2 .

It is a cyclic number.

It is not a de Polignac number, because 42551149 - 2³ = 42551141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42551149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42551141) 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 3 ways as a sum of consecutive naturals, for example, 733612 + ... + 733669.

It is an arithmetic number, because the mean of its divisors is an integer number (11004615).

Almost surely, 2^42551149 is an apocalyptic number.

It is an amenable number.

42551149 is a deficient number, since it is larger than the sum of its proper divisors (1467311).

42551149 is a wasteful number, since it uses less digits than its factorization.

42551149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467310.

The product of its digits is 7200, while the sum is 31.

The square root of 42551149 is about 6523.1241748107. The cubic root of 42551149 is about 349.1165446845.

The spelling of 42551149 in words is "forty-two million, five hundred fifty-one thousand, one hundred forty-nine".