2387405 has 6 divisors (see below), whose sum is σ = 2869038. Its totient is φ = 1907160.

The previous prime is 2387401. The next prime is 2387417. The reversal of 2387405 is 5047832.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1909924 + 477481 = 1382^2 + 691^2 .

It is not a de Polignac number, because 2387405 - 2² = 2387401 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 (2387401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3110 + ... + 3800.

It is an arithmetic number, because the mean of its divisors is an integer number (478173).

2^2387405 is an apocalyptic number.

It is an amenable number.

2387405 is a deficient number, since it is larger than the sum of its proper divisors (481633).

2387405 is an frugal number, since it uses more digits than its factorization.

2387405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 2387405 is about 1545.1229724524. The cubic root of 2387405 is about 133.6519705597.

The spelling of 2387405 in words is "two million, three hundred eighty-seven thousand, four hundred five".