42149545 has 8 divisors (see below), whose sum is σ = 53554824. Its totient is φ = 31736064.

The previous prime is 42149539. The next prime is 42149551. The reversal of 42149545 is 54594124.

It is an interprime number because it is at equal distance from previous prime (42149539) and next prime (42149551).

It can be written as a sum of positive squares in 4 ways, for example, as 14807104 + 27342441 = 3848^2 + 5229^2 .

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 42149545 - 2¹³ = 42141353 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 42149545.

It is an unprimeable number.

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, 247854 + ... + 248023.

It is an arithmetic number, because the mean of its divisors is an integer number (6694353).

Almost surely, 2^42149545 is an apocalyptic number.

It is an amenable number.

42149545 is a deficient number, since it is larger than the sum of its proper divisors (11405279).

42149545 is a wasteful number, since it uses less digits than its factorization.

42149545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495899.

The product of its digits is 28800, while the sum is 34.

The square root of 42149545 is about 6492.2680936634. The cubic root of 42149545 is about 348.0147332689.

The spelling of 42149545 in words is "forty-two million, one hundred forty-nine thousand, five hundred forty-five".