42546401 has 2 divisors, whose sum is σ = 42546402. Its totient is φ = 42546400.

The previous prime is 42546373. The next prime is 42546419. The reversal of 42546401 is 10464524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29593600 + 12952801 = 5440^2 + 3599^2 .

It is a cyclic number.

It is not a de Polignac number, because 42546401 - 2¹⁴ = 42530017 is a prime.

It is not a weakly prime, because it can be changed into another prime (42546701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21273200 + 21273201.

It is an arithmetic number, because the mean of its divisors is an integer number (21273201).

Almost surely, 2^42546401 is an apocalyptic number.

It is an amenable number.

42546401 is a deficient number, since it is larger than the sum of its proper divisors (1).

42546401 is an equidigital number, since it uses as much as digits as its factorization.

42546401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 42546401 is about 6522.7602286149. The cubic root of 42546401 is about 349.1035590030.

The spelling of 42546401 in words is "forty-two million, five hundred forty-six thousand, four hundred one".