1405679 has 8 divisors (see below), whose sum is σ = 1623888. Its totient is φ = 1202560.

The previous prime is 1405669. The next prime is 1405681. The reversal of 1405679 is 9765041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1405679 - 2²⁰ = 357103 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 (1405669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3572 + ... + 3945.

It is an arithmetic number, because the mean of its divisors is an integer number (202986).

2^1405679 is an apocalyptic number.

1405679 is a deficient number, since it is larger than the sum of its proper divisors (218209).

1405679 is a wasteful number, since it uses less digits than its factorization.

1405679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7545.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1405679 is about 1185.6133433797. The cubic root of 1405679 is about 112.0199528652.

The spelling of 1405679 in words is "one million, four hundred five thousand, six hundred seventy-nine".