72261037 has 4 divisors (see below), whose sum is σ = 74214076. Its totient is φ = 70308000.

The previous prime is 72261019. The next prime is 72261071. The reversal of 72261037 is 73016227.

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 39702601 + 32558436 = 6301^2 + 5706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72261037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72260996 and 72261014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72261097) 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, 976464 + ... + 976537.

It is an arithmetic number, because the mean of its divisors is an integer number (18553519).

Almost surely, 2^72261037 is an apocalyptic number.

It is an amenable number.

72261037 is a deficient number, since it is larger than the sum of its proper divisors (1953039).

72261037 is a wasteful number, since it uses less digits than its factorization.

72261037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953038.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 72261037 is about 8500.6492105015. The cubic root of 72261037 is about 416.5189164317.

The spelling of 72261037 in words is "seventy-two million, two hundred sixty-one thousand, thirty-seven".