42774077 has 4 divisors (see below), whose sum is σ = 43021500. Its totient is φ = 42526656.

The previous prime is 42774049. The next prime is 42774097. The reversal of 42774077 is 77047724.

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 15952036 + 26822041 = 3994^2 + 5179^2 .

It is a cyclic number.

It is not a de Polignac number, because 42774077 - 2⁶ = 42774013 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 42774077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42774097) 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, 123452 + ... + 123797.

It is an arithmetic number, because the mean of its divisors is an integer number (10755375).

Almost surely, 2^42774077 is an apocalyptic number.

It is an amenable number.

42774077 is a deficient number, since it is larger than the sum of its proper divisors (247423).

42774077 is a wasteful number, since it uses less digits than its factorization.

42774077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247422.

The product of its (nonzero) digits is 76832, while the sum is 38.

The square root of 42774077 is about 6540.1893703470. The cubic root of 42774077 is about 349.7251638343.

The spelling of 42774077 in words is "forty-two million, seven hundred seventy-four thousand, seventy-seven".