42455489 has 2 divisors, whose sum is σ = 42455490. Its totient is φ = 42455488.

The previous prime is 42455471. The next prime is 42455503. The reversal of 42455489 is 98455424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22963264 + 19492225 = 4792^2 + 4415^2 .

It is a cyclic number.

It is not a de Polignac number, because 42455489 - 2¹² = 42451393 is a prime.

It is not a weakly prime, because it can be changed into another prime (42455389) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21227744 + 21227745.

It is an arithmetic number, because the mean of its divisors is an integer number (21227745).

Almost surely, 2^42455489 is an apocalyptic number.

It is an amenable number.

42455489 is a deficient number, since it is larger than the sum of its proper divisors (1).

42455489 is an equidigital number, since it uses as much as digits as its factorization.

42455489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 41.

The square root of 42455489 is about 6515.7876730293. The cubic root of 42455489 is about 348.8547300045.

It can be divided in two parts, 4 and 2455489, that multiplied together give a square (9821956 = 3134²).

The spelling of 42455489 in words is "forty-two million, four hundred fifty-five thousand, four hundred eighty-nine".