103212345 has 32 divisors (see below), whose sum is σ = 168652800. Its totient is φ = 53887680.

The previous prime is 103212323. The next prime is 103212391. The reversal of 103212345 is 543212301.

It is not a de Polignac number, because 103212345 - 2⁷ = 103212217 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211692 + ... + 212178.

It is an arithmetic number, because the mean of its divisors is an integer number (5270400).

Almost surely, 2^103212345 is an apocalyptic number.

103212345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

103212345 is a deficient number, since it is larger than the sum of its proper divisors (65440455).

103212345 is a wasteful number, since it uses less digits than its factorization.

103212345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 103212345 is about 10159.3476660660. The cubic root of 103212345 is about 469.0767222637.

Adding to 103212345 its reverse (543212301), we get a palindrome (646424646).

The spelling of 103212345 in words is "one hundred three million, two hundred twelve thousand, three hundred forty-five".