72261055 has 8 divisors (see below), whose sum is σ = 90483552. Its totient is φ = 55295328.

The previous prime is 72261019. The next prime is 72261071. The reversal of 72261055 is 55016227.

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 72261055 - 2⁷ = 72260927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314064 + ... + 314293.

It is an arithmetic number, because the mean of its divisors is an integer number (11310444).

Almost surely, 2^72261055 is an apocalyptic number.

72261055 is a deficient number, since it is larger than the sum of its proper divisors (18222497).

72261055 is a wasteful number, since it uses less digits than its factorization.

72261055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628385.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 72261055 is about 8500.6502692441. The cubic root of 72261055 is about 416.5189510162.

It can be divided in two parts, 7226 and 1055, that added together give a square (8281 = 91²).

The spelling of 72261055 in words is "seventy-two million, two hundred sixty-one thousand, fifty-five".