42770449 has 2 divisors, whose sum is σ = 42770450. Its totient is φ = 42770448.

The previous prime is 42770437. The next prime is 42770467. The reversal of 42770449 is 94407724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38526849 + 4243600 = 6207^2 + 2060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42770449 is a prime.

It is a super-2 number, since 2×42770449² = 3658622615323202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42770479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21385224 + 21385225.

It is an arithmetic number, because the mean of its divisors is an integer number (21385225).

Almost surely, 2^42770449 is an apocalyptic number.

It is an amenable number.

42770449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42770449 is an equidigital number, since it uses as much as digits as its factorization.

42770449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 42770449 is about 6539.9120024661. The cubic root of 42770449 is about 349.7152759235.

It can be divided in two parts, 427 and 70449, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 42770449 in words is "forty-two million, seven hundred seventy thousand, four hundred forty-nine".