72603481 has 16 divisors (see below), whose sum is σ = 79669008. Its totient is φ = 65894400.

The previous prime is 72603473. The next prime is 72603521. The reversal of 72603481 is 18430627.

It can be written as a sum of positive squares in 8 ways, for example, as 3297856 + 69305625 = 1816^2 + 8325^2 .

It is a cyclic number.

It is not a de Polignac number, because 72603481 - 2³ = 72603473 is a prime.

It is a super-2 number, since 2×72603481² = 10542530906634722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72603281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54301 + ... + 55621.

It is an arithmetic number, because the mean of its divisors is an integer number (4979313).

Almost surely, 2^72603481 is an apocalyptic number.

It is an amenable number.

72603481 is a deficient number, since it is larger than the sum of its proper divisors (7065527).

72603481 is a wasteful number, since it uses less digits than its factorization.

72603481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 72603481 is about 8520.7676297385. The cubic root of 72603481 is about 417.1758388292.

The spelling of 72603481 in words is "seventy-two million, six hundred three thousand, four hundred eighty-one".