45123149 has 8 divisors (see below), whose sum is σ = 46189440. Its totient is φ = 44061376.

The previous prime is 45123137. The next prime is 45123161. The reversal of 45123149 is 94132154.

It is an interprime number because it is at equal distance from previous prime (45123137) and next prime (45123161).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45123149 - 2⁸ = 45122893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45123349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27062 + ... + 28680.

It is an arithmetic number, because the mean of its divisors is an integer number (5773680).

Almost surely, 2^45123149 is an apocalyptic number.

It is an amenable number.

45123149 is a deficient number, since it is larger than the sum of its proper divisors (1066291).

45123149 is a wasteful number, since it uses less digits than its factorization.

45123149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259.

The product of its digits is 4320, while the sum is 29.

The square root of 45123149 is about 6717.3766456854. The cubic root of 45123149 is about 356.0134999930.

The spelling of 45123149 in words is "forty-five million, one hundred twenty-three thousand, one hundred forty-nine".