345120434 has 16 divisors (see below), whose sum is σ = 553565016. Its totient is φ = 160800000.

The previous prime is 345120409. The next prime is 345120443. The reversal of 345120434 is 434021543.

It can be written as a sum of positive squares in 4 ways, for example, as 338376025 + 6744409 = 18395^2 + 2597^2 .

It is a super-2 number, since 2×345120434² = 238216227928696712, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46817 + ... + 53684.

Almost surely, 2^345120434 is an apocalyptic number.

345120434 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

345120434 is a deficient number, since it is larger than the sum of its proper divisors (208444582).

345120434 is a wasteful number, since it uses less digits than its factorization.

345120434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100621.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 345120434 is about 18577.4173124253. The cubic root of 345120434 is about 701.4395098104.

Adding to 345120434 its reverse (434021543), we get a palindrome (779141977).

The spelling of 345120434 in words is "three hundred forty-five million, one hundred twenty thousand, four hundred thirty-four".