42279049 has 4 divisors (see below), whose sum is σ = 43421764. Its totient is φ = 41136336.

The previous prime is 42279043. The next prime is 42279059. The reversal of 42279049 is 94097224.

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 24681024 + 17598025 = 4968^2 + 4195^2 .

It is a cyclic number.

It is not a de Polignac number, because 42279049 - 2¹⁷ = 42147977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1142677 = 42279049 / (4 + 2 + 2 + 7 + 9 + 0 + 4 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42278999 and 42279017.

It is not an unprimeable number, because it can be changed into a prime (42279043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571302 + ... + 571375.

It is an arithmetic number, because the mean of its divisors is an integer number (10855441).

Almost surely, 2^42279049 is an apocalyptic number.

It is an amenable number.

42279049 is a deficient number, since it is larger than the sum of its proper divisors (1142715).

42279049 is a wasteful number, since it uses less digits than its factorization.

42279049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142714.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 42279049 is about 6502.2341545041. The cubic root of 42279049 is about 348.3707926312.

The spelling of 42279049 in words is "forty-two million, two hundred seventy-nine thousand, forty-nine".