1405345 has 4 divisors (see below), whose sum is σ = 1686420. Its totient is φ = 1124272.

The previous prime is 1405343. The next prime is 1405351. The reversal of 1405345 is 5435041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5435041 = 37 ⋅146893.

It can be written as a sum of positive squares in 2 ways, for example, as 1096209 + 309136 = 1047^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405345 - 2¹ = 1405343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1405343) 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, 140530 + ... + 140539.

It is an arithmetic number, because the mean of its divisors is an integer number (421605).

2^1405345 is an apocalyptic number.

It is an amenable number.

1405345 is a deficient number, since it is larger than the sum of its proper divisors (281075).

1405345 is an equidigital number, since it uses as much as digits as its factorization.

1405345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281074.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1405345 is about 1185.4724796468. The cubic root of 1405345 is about 112.0110798988.

The spelling of 1405345 in words is "one million, four hundred five thousand, three hundred forty-five".