72261057 has 8 divisors (see below), whose sum is σ = 105107040. Its totient is φ = 43794560.

The previous prime is 72261019. The next prime is 72261071. The reversal of 72261057 is 75016227.

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

It is a cyclic number.

It is not a de Polignac number, because 72261057 - 2⁸ = 72260801 is a prime.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (72261097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094832 + ... + 1094897.

It is an arithmetic number, because the mean of its divisors is an integer number (13138380).

Almost surely, 2^72261057 is an apocalyptic number.

It is an amenable number.

72261057 is a deficient number, since it is larger than the sum of its proper divisors (32845983).

72261057 is a wasteful number, since it uses less digits than its factorization.

72261057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189743.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 72261057 is about 8500.6503868822. The cubic root of 72261057 is about 416.5189548589.

The spelling of 72261057 in words is "seventy-two million, two hundred sixty-one thousand, fifty-seven".