1405252405 has 8 divisors (see below), whose sum is σ = 1691082072. Its totient is φ = 1121015808.

The previous prime is 1405252403. The next prime is 1405252411. The reversal of 1405252405 is 5042525041.

It can be written as a sum of positive squares in 4 ways, for example, as 86545809 + 1318706596 = 9303^2 + 36314^2 .

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 1405252405 - 2¹ = 1405252403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405252403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396324 + ... + 399853.

It is an arithmetic number, because the mean of its divisors is an integer number (211385259).

Almost surely, 2^1405252405 is an apocalyptic number.

It is an amenable number.

1405252405 is a deficient number, since it is larger than the sum of its proper divisors (285829667).

1405252405 is an equidigital number, since it uses as much as digits as its factorization.

1405252405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796535.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 1405252405 is about 37486.6963735136. The cubic root of 1405252405 is about 1120.0861979258.

Adding to 1405252405 its reverse (5042525041), we get a palindrome (6447777446).

The spelling of 1405252405 in words is "one billion, four hundred five million, two hundred fifty-two thousand, four hundred five".