72672242 has 4 divisors (see below), whose sum is σ = 109008366. Its totient is φ = 36336120.

The previous prime is 72672241. The next prime is 72672251. The reversal of 72672242 is 24227627.

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

It can be written as a sum of positive squares in only one way, i.e., 64657681 + 8014561 = 8041^2 + 2831^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72672199 and 72672208.

It is not an unprimeable number, because it can be changed into a prime (72672241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18168059 + ... + 18168062.

Almost surely, 2^72672242 is an apocalyptic number.

72672242 is a deficient number, since it is larger than the sum of its proper divisors (36336124).

72672242 is a wasteful number, since it uses less digits than its factorization.

72672242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36336123.

The product of its digits is 18816, while the sum is 32.

The square root of 72672242 is about 8524.8015812686. The cubic root of 72672242 is about 417.3074963221.

Adding to 72672242 its reverse (24227627), we get a palindrome (96899869).

The spelling of 72672242 in words is "seventy-two million, six hundred seventy-two thousand, two hundred forty-two".