1405487 has 4 divisors (see below), whose sum is σ = 1479480. Its totient is φ = 1331496.

The previous prime is 1405477. The next prime is 1405493. The reversal of 1405487 is 7845041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1405487 - 2¹⁶ = 1339951 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405477) 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, 36968 + ... + 37005.

It is an arithmetic number, because the mean of its divisors is an integer number (369870).

2^1405487 is an apocalyptic number.

1405487 is a deficient number, since it is larger than the sum of its proper divisors (73993).

1405487 is an equidigital number, since it uses as much as digits as its factorization.

1405487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73992.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 1405487 is about 1185.5323698660. The cubic root of 1405487 is about 112.0148524096.

It can be divided in two parts, 14054 and 87, that added together give a palindrome (14141).

The spelling of 1405487 in words is "one million, four hundred five thousand, four hundred eighty-seven".