42223129 has 12 divisors (see below), whose sum is σ = 45905916. Its totient is φ = 38817792.

The previous prime is 42223117. The next prime is 42223133. The reversal of 42223129 is 92132224.

It can be written as a sum of positive squares in 6 ways, for example, as 2822400 + 39400729 = 1680^2 + 6277^2 .

It is not a de Polignac number, because 42223129 - 2²¹ = 40125977 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42223169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72889 + ... + 73465.

It is an arithmetic number, because the mean of its divisors is an integer number (3825493).

Almost surely, 2^42223129 is an apocalyptic number.

It is an amenable number.

42223129 is a deficient number, since it is larger than the sum of its proper divisors (3682787).

42223129 is a wasteful number, since it uses less digits than its factorization.

42223129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1023 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 42223129 is about 6497.9326712424. The cubic root of 42223129 is about 348.2171350455.

The spelling of 42223129 in words is "forty-two million, two hundred twenty-three thousand, one hundred twenty-nine".