345140405 has 8 divisors (see below), whose sum is σ = 415493592. Its totient is φ = 275228928.

The previous prime is 345140387. The next prime is 345140437. The reversal of 345140405 is 504041543.

It can be written as a sum of positive squares in 4 ways, for example, as 32239684 + 312900721 = 5678^2 + 17689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345140405 - 2²⁰ = 344091829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108704 + ... + 111833.

It is an arithmetic number, because the mean of its divisors is an integer number (51936699).

Almost surely, 2^345140405 is an apocalyptic number.

It is an amenable number.

345140405 is a deficient number, since it is larger than the sum of its proper divisors (70353187).

345140405 is a wasteful number, since it uses less digits than its factorization.

345140405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220855.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 345140405 is about 18577.9548120884. The cubic root of 345140405 is about 701.4530395591.

Adding to 345140405 its reverse (504041543), we get a palindrome (849181948).

The spelling of 345140405 in words is "three hundred forty-five million, one hundred forty thousand, four hundred five".