345500421 has 24 divisors (see below), whose sum is σ = 536885280. Its totient is φ = 197057952.

The previous prime is 345500381. The next prime is 345500423. The reversal of 345500421 is 124005543.

It is not a de Polignac number, because 345500421 - 2⁷ = 345500293 is a prime.

It is a super-2 number, since 2×345500421² = 238741081822354482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 345500391 and 345500400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345500423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89095 + ... + 92891.

It is an arithmetic number, because the mean of its divisors is an integer number (22370220).

Almost surely, 2^345500421 is an apocalyptic number.

It is an amenable number.

345500421 is a deficient number, since it is larger than the sum of its proper divisors (191384859).

345500421 is a wasteful number, since it uses less digits than its factorization.

345500421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433 (or 4426 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 345500421 is about 18587.6416201733. The cubic root of 345500421 is about 701.6968500572.

Adding to 345500421 its reverse (124005543), we get a palindrome (469505964).

The spelling of 345500421 in words is "three hundred forty-five million, five hundred thousand, four hundred twenty-one".