42129465 has 72 divisors (see below), whose sum is σ = 82867968. Its totient is φ = 18204480.

The previous prime is 42129463. The next prime is 42129497. The reversal of 42129465 is 56492124.

It is not a de Polignac number, because 42129465 - 2¹ = 42129463 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42129463) 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 in 71 ways as a sum of consecutive naturals, for example, 979734 + ... + 979776.

It is an arithmetic number, because the mean of its divisors is an integer number (1150944).

Almost surely, 2^42129465 is an apocalyptic number.

It is an amenable number.

42129465 is a deficient number, since it is larger than the sum of its proper divisors (40738503).

42129465 is a wasteful number, since it uses less digits than its factorization.

42129465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 89 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 42129465 is about 6490.7214545072. The cubic root of 42129465 is about 347.9594598699.

The spelling of 42129465 in words is "forty-two million, one hundred twenty-nine thousand, four hundred sixty-five".