1565406413 has 4 divisors (see below), whose sum is σ = 1568544000. Its totient is φ = 1562268828.

The previous prime is 1565406407. The next prime is 1565406419. The reversal of 1565406413 is 3146045651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1565406407) and next prime (1565406419).

It is a cyclic number.

It is not a de Polignac number, because 1565406413 - 2¹² = 1565402317 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 (1565406419) by changing a digit.

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, 1568045 + ... + 1569042.

It is an arithmetic number, because the mean of its divisors is an integer number (392136000).

Almost surely, 2^1565406413 is an apocalyptic number.

It is an amenable number.

1565406413 is a deficient number, since it is larger than the sum of its proper divisors (3137587).

1565406413 is an equidigital number, since it uses as much as digits as its factorization.

1565406413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137586.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1565406413 is about 39565.2172115862. The cubic root of 1565406413 is about 1161.1162493770.

The spelling of 1565406413 in words is "one billion, five hundred sixty-five million, four hundred six thousand, four hundred thirteen".