1405689041 has 4 divisors (see below), whose sum is σ = 1405764672. Its totient is φ = 1405613412.

The previous prime is 1405689031. The next prime is 1405689053. The reversal of 1405689041 is 1409865041.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1405689041 - 2¹⁴ = 1405672657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1405688986 and 1405689004.

It is not an unprimeable number, because it can be changed into a prime (1405689031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11516 + ... + 54258.

It is an arithmetic number, because the mean of its divisors is an integer number (351441168).

Almost surely, 2^1405689041 is an apocalyptic number.

It is an amenable number.

1405689041 is a deficient number, since it is larger than the sum of its proper divisors (75631).

1405689041 is an equidigital number, since it uses as much as digits as its factorization.

1405689041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75630.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1405689041 is about 37492.5198006216. The cubic root of 1405689041 is about 1120.2021959035.

The spelling of 1405689041 in words is "one billion, four hundred five million, six hundred eighty-nine thousand, forty-one".