345721103 has 12 divisors (see below), whose sum is σ = 427842288. Its totient is φ = 273536640.

The previous prime is 345721097. The next prime is 345721109. The reversal of 345721103 is 301127543.

It is an interprime number because it is at equal distance from previous prime (345721097) and next prime (345721109).

It is not a de Polignac number, because 345721103 - 2⁴ = 345721087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345721109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144938 + ... + 147303.

It is an arithmetic number, because the mean of its divisors is an integer number (35653524).

Almost surely, 2^345721103 is an apocalyptic number.

345721103 is a deficient number, since it is larger than the sum of its proper divisors (82121185).

345721103 is a wasteful number, since it uses less digits than its factorization.

345721103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292274 (or 292261 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 345721103 is about 18593.5769286063. The cubic root of 345721103 is about 701.8462168856.

Adding to 345721103 its reverse (301127543), we get a palindrome (646848646).

The spelling of 345721103 in words is "three hundred forty-five million, seven hundred twenty-one thousand, one hundred three".