1406423405 has 8 divisors (see below), whose sum is σ = 1688197632. Its totient is φ = 1124812368.

The previous prime is 1406423401. The next prime is 1406423419. The reversal of 1406423405 is 5043246041.

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 1406423405 - 2² = 1406423401 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 (1406423401) 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, 20957 + ... + 57026.

It is an arithmetic number, because the mean of its divisors is an integer number (211024704).

Almost surely, 2^1406423405 is an apocalyptic number.

It is an amenable number.

1406423405 is a deficient number, since it is larger than the sum of its proper divisors (281774227).

1406423405 is an equidigital number, since it uses as much as digits as its factorization.

1406423405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81595.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1406423405 is about 37502.3119953957. The cubic root of 1406423405 is about 1120.3972349979.

Adding to 1406423405 its reverse (5043246041), we get a palindrome (6449669446).

The spelling of 1406423405 in words is "one billion, four hundred six million, four hundred twenty-three thousand, four hundred five".