42149077 has 4 divisors (see below), whose sum is σ = 42367660. Its totient is φ = 41930496.

The previous prime is 42149059. The next prime is 42149089. The reversal of 42149077 is 77094124.

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 15046641 + 27102436 = 3879^2 + 5206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42149077 is a prime.

It is a super-4 number, since 4×42149077⁴ (a number of 32 digits) contains 4444 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 (42149047) 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 3 ways as a sum of consecutive naturals, for example, 109002 + ... + 109387.

It is an arithmetic number, because the mean of its divisors is an integer number (10591915).

Almost surely, 2^42149077 is an apocalyptic number.

It is an amenable number.

42149077 is a deficient number, since it is larger than the sum of its proper divisors (218583).

42149077 is a wasteful number, since it uses less digits than its factorization.

42149077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218582.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 42149077 is about 6492.2320506895. The cubic root of 42149077 is about 348.0134452241.

The spelling of 42149077 in words is "forty-two million, one hundred forty-nine thousand, seventy-seven".