42279157 has 2 divisors, whose sum is σ = 42279158. Its totient is φ = 42279156.

The previous prime is 42279109. The next prime is 42279169. The reversal of 42279157 is 75197224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33074001 + 9205156 = 5751^2 + 3034^2 .

It is a cyclic number.

It is not a de Polignac number, because 42279157 - 2¹⁵ = 42246389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42229157) 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, 21139578 + 21139579.

It is an arithmetic number, because the mean of its divisors is an integer number (21139579).

Almost surely, 2^42279157 is an apocalyptic number.

It is an amenable number.

42279157 is a deficient number, since it is larger than the sum of its proper divisors (1).

42279157 is an equidigital number, since it uses as much as digits as its factorization.

42279157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 42279157 is about 6502.2424593366. The cubic root of 42279157 is about 348.3710892636.

It can be divided in two parts, 42279 and 157, that added together give a square (42436 = 206²).

The spelling of 42279157 in words is "forty-two million, two hundred seventy-nine thousand, one hundred fifty-seven".