72103258 has 4 divisors (see below), whose sum is σ = 108154890. Its totient is φ = 36051628.

The previous prime is 72103253. The next prime is 72103277. The reversal of 72103258 is 85230127.

72103258 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39350529 + 32752729 = 6273^2 + 5723^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (72103253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18025813 + ... + 18025816.

Almost surely, 2^72103258 is an apocalyptic number.

72103258 is a deficient number, since it is larger than the sum of its proper divisors (36051632).

72103258 is a wasteful number, since it uses less digits than its factorization.

72103258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36051631.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 72103258 is about 8491.3637302850. The cubic root of 72103258 is about 416.2155448880.

It can be divided in two parts, 72103 and 258, that added together give a square (72361 = 269²).

The spelling of 72103258 in words is "seventy-two million, one hundred three thousand, two hundred fifty-eight".