42455321 has 2 divisors, whose sum is σ = 42455322. Its totient is φ = 42455320.

The previous prime is 42455293. The next prime is 42455327. The reversal of 42455321 is 12355424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22429696 + 20025625 = 4736^2 + 4475^2 .

It is a cyclic number.

It is not a de Polignac number, because 42455321 - 2²² = 38261017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42455327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21227660 + 21227661.

It is an arithmetic number, because the mean of its divisors is an integer number (21227661).

Almost surely, 2^42455321 is an apocalyptic number.

It is an amenable number.

42455321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42455321 is an equidigital number, since it uses as much as digits as its factorization.

42455321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 26.

The square root of 42455321 is about 6515.7747812520. The cubic root of 42455321 is about 348.8542698546.

The spelling of 42455321 in words is "forty-two million, four hundred fifty-five thousand, three hundred twenty-one".