1403404561 has 24 divisors (see below), whose sum is σ = 1576610880. Its totient is φ = 1247628096.

The previous prime is 1403404549. The next prime is 1403404591. The reversal of 1403404561 is 1654043041.

It is not a de Polignac number, because 1403404561 - 2⁷ = 1403404433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1403404591) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 642970 + ... + 645148.

It is an arithmetic number, because the mean of its divisors is an integer number (65692120).

Almost surely, 2^1403404561 is an apocalyptic number.

It is an amenable number.

1403404561 is a deficient number, since it is larger than the sum of its proper divisors (173206319).

1403404561 is a wasteful number, since it uses less digits than its factorization.

1403404561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2332 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1403404561 is about 37462.0416021338. The cubic root of 1403404561 is about 1119.5950281726.

The spelling of 1403404561 in words is "one billion, four hundred three million, four hundred four thousand, five hundred sixty-one".