345481 has 4 divisors (see below), whose sum is σ = 347652. Its totient is φ = 343312.

The previous prime is 345479. The next prime is 345487. The reversal of 345481 is 184543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184543 = 31 ⋅5953.

It can be written as a sum of positive squares in 2 ways, for example, as 147456 + 198025 = 384^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 345481 - 2¹ = 345479 is a prime.

It is a super-2 number, since 2×345481² = 238714242722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826 + ... + 1171.

It is an arithmetic number, because the mean of its divisors is an integer number (86913).

2³⁴⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

345481 is a deficient number, since it is larger than the sum of its proper divisors (2171).

345481 is a wasteful number, since it uses less digits than its factorization.

345481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170.

The product of its digits is 1920, while the sum is 25.

The square root of 345481 is about 587.7763179986. The cubic root of 345481 is about 70.1683702066.

The spelling of 345481 in words is "three hundred forty-five thousand, four hundred eighty-one".