42928129 has 2 divisors, whose sum is σ = 42928130. Its totient is φ = 42928128.

The previous prime is 42928121. The next prime is 42928133. The reversal of 42928129 is 92182924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37797904 + 5130225 = 6148^2 + 2265^2 .

It is a cyclic number.

It is not a de Polignac number, because 42928129 - 2³ = 42928121 is a prime.

It is not a weakly prime, because it can be changed into another prime (42928121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21464064 + 21464065.

It is an arithmetic number, because the mean of its divisors is an integer number (21464065).

Almost surely, 2^42928129 is an apocalyptic number.

It is an amenable number.

42928129 is a deficient number, since it is larger than the sum of its proper divisors (1).

42928129 is an equidigital number, since it uses as much as digits as its factorization.

42928129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 42928129 is about 6551.9561201217. The cubic root of 42928129 is about 350.1445090340.

It can be divided in two parts, 4292 and 8129, that added together give a palindrome (12421).

The spelling of 42928129 in words is "forty-two million, nine hundred twenty-eight thousand, one hundred twenty-nine".