42479251 has 2 divisors, whose sum is σ = 42479252. Its totient is φ = 42479250.

The previous prime is 42479221. The next prime is 42479263. The reversal of 42479251 is 15297424.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42479251 - 2¹³ = 42471059 is a prime.

It is not a weakly prime, because it can be changed into another prime (42479201) 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, 21239625 + 21239626.

It is an arithmetic number, because the mean of its divisors is an integer number (21239626).

Almost surely, 2^42479251 is an apocalyptic number.

42479251 is a deficient number, since it is larger than the sum of its proper divisors (1).

42479251 is an equidigital number, since it uses as much as digits as its factorization.

42479251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 42479251 is about 6517.6108352678. The cubic root of 42479251 is about 348.9198016066.

The spelling of 42479251 in words is "forty-two million, four hundred seventy-nine thousand, two hundred fifty-one".