42280949 has 4 divisors (see below), whose sum is σ = 42296460. Its totient is φ = 42265440.

The previous prime is 42280937. The next prime is 42280999. The reversal of 42280949 is 94908224.

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 23833924 + 18447025 = 4882^2 + 4295^2 .

It is a cyclic number.

It is not a de Polignac number, because 42280949 - 2¹⁶ = 42215413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42280919) 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, 2462 + ... + 9519.

It is an arithmetic number, because the mean of its divisors is an integer number (10574115).

Almost surely, 2^42280949 is an apocalyptic number.

It is an amenable number.

42280949 is a deficient number, since it is larger than the sum of its proper divisors (15511).

42280949 is a wasteful number, since it uses less digits than its factorization.

42280949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15510.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 42280949 is about 6502.3802564907. The cubic root of 42280949 is about 348.3760110913.

The spelling of 42280949 in words is "forty-two million, two hundred eighty thousand, nine hundred forty-nine".