42672229 has 4 divisors (see below), whose sum is σ = 42808876. Its totient is φ = 42535584.

The previous prime is 42672221. The next prime is 42672241. The reversal of 42672229 is 92227624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 487204 + 42185025 = 698^2 + 6495^2 .

It is a cyclic number.

It is not a de Polignac number, because 42672229 - 2³ = 42672221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42672194 and 42672203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42672221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67854 + ... + 68479.

It is an arithmetic number, because the mean of its divisors is an integer number (10702219).

Almost surely, 2^42672229 is an apocalyptic number.

It is an amenable number.

42672229 is a deficient number, since it is larger than the sum of its proper divisors (136647).

42672229 is a wasteful number, since it uses less digits than its factorization.

42672229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136646.

The product of its digits is 24192, while the sum is 34.

The square root of 42672229 is about 6532.3984109973. The cubic root of 42672229 is about 349.4473700651.

The spelling of 42672229 in words is "forty-two million, six hundred seventy-two thousand, two hundred twenty-nine".