81258103 has 6 divisors (see below), whose sum is σ = 84945224. Its totient is φ = 77724636.

The previous prime is 81258097. The next prime is 81258109. The reversal of 81258103 is 30185218.

It is an interprime number because it is at equal distance from previous prime (81258097) and next prime (81258109).

It is not a de Polignac number, because 81258103 - 2⁵ = 81258071 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81258109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76275 + ... + 77332.

Almost surely, 2^81258103 is an apocalyptic number.

81258103 is a deficient number, since it is larger than the sum of its proper divisors (3687121).

81258103 is a wasteful number, since it uses less digits than its factorization.

81258103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153653 (or 153630 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 81258103 is about 9014.3276510231. The cubic root of 81258103 is about 433.1339504184.

The spelling of 81258103 in words is "eighty-one million, two hundred fifty-eight thousand, one hundred three".