42776243 has 4 divisors (see below), whose sum is σ = 43819608. Its totient is φ = 41732880.

The previous prime is 42776231. The next prime is 42776257. The reversal of 42776243 is 34267724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42776243 - 2¹⁴ = 42759859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42776203) 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, 521621 + ... + 521702.

It is an arithmetic number, because the mean of its divisors is an integer number (10954902).

Almost surely, 2^42776243 is an apocalyptic number.

42776243 is a deficient number, since it is larger than the sum of its proper divisors (1043365).

42776243 is a wasteful number, since it uses less digits than its factorization.

42776243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043364.

The product of its digits is 56448, while the sum is 35.

The square root of 42776243 is about 6540.3549597862. The cubic root of 42776243 is about 349.7310668794.

The spelling of 42776243 in words is "forty-two million, seven hundred seventy-six thousand, two hundred forty-three".