72120050 has 18 divisors (see below), whose sum is σ = 134255079. Its totient is φ = 28824000.

The previous prime is 72120031. The next prime is 72120079. The reversal of 72120050 is 5002127.

It can be written as a sum of positive squares in 5 ways, for example, as 734449 + 71385601 = 857^2 + 8449^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6005.

It is a super-2 number, since 2×72120050² = 10402603224005000, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 59450 + ... + 60650.

Almost surely, 2^72120050 is an apocalyptic number.

72120050 is a deficient number, since it is larger than the sum of its proper divisors (62135029).

72120050 is an equidigital number, since it uses as much as digits as its factorization.

72120050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 72120050 is about 8492.3524420504. The cubic root of 72120050 is about 416.2478529470.

Adding to 72120050 its reverse (5002127), we get a palindrome (77122177).

It can be divided in two parts, 72 and 120050, that multiplied together give a square (8643600 = 2940²).

The spelling of 72120050 in words is "seventy-two million, one hundred twenty thousand, fifty".