1405025609 has 12 divisors (see below), whose sum is σ = 1530559296. Its totient is φ = 1289154672.

The previous prime is 1405025593. The next prime is 1405025621. The reversal of 1405025609 is 9065205041.

It is a happy number.

It is not a de Polignac number, because 1405025609 - 2⁴ = 1405025593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1405025659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3332 + ... + 53114.

It is an arithmetic number, because the mean of its divisors is an integer number (127546608).

Almost surely, 2^1405025609 is an apocalyptic number.

It is an amenable number.

1405025609 is a deficient number, since it is larger than the sum of its proper divisors (125533687).

1405025609 is a wasteful number, since it uses less digits than its factorization.

1405025609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49976 (or 49963 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1405025609 is about 37483.6712316176. The cubic root of 1405025609 is about 1120.0259371651.

The spelling of 1405025609 in words is "one billion, four hundred five million, twenty-five thousand, six hundred nine".