1405563245 has 4 divisors (see below), whose sum is σ = 1686675900. Its totient is φ = 1124450592.

The previous prime is 1405563221. The next prime is 1405563259. The reversal of 1405563245 is 5423655041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180983209 + 1224580036 = 13453^2 + 34994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405563245 - 2¹² = 1405559149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140556320 + ... + 140556329.

It is an arithmetic number, because the mean of its divisors is an integer number (421668975).

Almost surely, 2^1405563245 is an apocalyptic number.

It is an amenable number.

1405563245 is a deficient number, since it is larger than the sum of its proper divisors (281112655).

1405563245 is an equidigital number, since it uses as much as digits as its factorization.

1405563245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281112654.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 1405563245 is about 37490.8421484501. The cubic root of 1405563245 is about 1120.1687790394.

The spelling of 1405563245 in words is "one billion, four hundred five million, five hundred sixty-three thousand, two hundred forty-five".