72707122 has 8 divisors (see below), whose sum is σ = 109199916. Its totient is φ = 36307152.

The previous prime is 72707111. The next prime is 72707189. The reversal of 72707122 is 22170727.

It can be written as a sum of positive squares in 2 ways, for example, as 65626201 + 7080921 = 8101^2 + 2661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21213 + ... + 24400.

Almost surely, 2^72707122 is an apocalyptic number.

72707122 is a deficient number, since it is larger than the sum of its proper divisors (36492794).

72707122 is a wasteful number, since it uses less digits than its factorization.

72707122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46412.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 72707122 is about 8526.8471312672. The cubic root of 72707122 is about 417.3742497205.

Adding to 72707122 its reverse (22170727), we get a palindrome (94877849).

The spelling of 72707122 in words is "seventy-two million, seven hundred seven thousand, one hundred twenty-two".