1405407 has 12 divisors (see below), whose sum is σ = 1991816. Its totient is φ = 881280.

The previous prime is 1405403. The next prime is 1405421. The reversal of 1405407 is 7045041.

It is not a de Polignac number, because 1405407 - 2² = 1405403 is a prime.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405403) 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, 57 + ... + 1677.

2^1405407 is an apocalyptic number.

1405407 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1405407 is a deficient number, since it is larger than the sum of its proper divisors (586409).

1405407 is a wasteful number, since it uses less digits than its factorization.

1405407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658 (or 1641 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 1405407 is about 1185.4986292696. The cubic root of 1405407 is about 112.0127270826.

The spelling of 1405407 in words is "one million, four hundred five thousand, four hundred seven".