2130405 has 16 divisors (see below), whose sum is σ = 3442560. Its totient is φ = 1124928.

The previous prime is 2130391. The next prime is 2130437. The reversal of 2130405 is 5040312.

It is not a de Polignac number, because 2130405 - 2⁶ = 2130341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a d-powerful number, because it can be written as 2⁷ + 1 + 3¹¹ + 0 + 4 + 0 + 5⁹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 984 + ... + 2286.

It is an arithmetic number, because the mean of its divisors is an integer number (215160).

2^2130405 is an apocalyptic number.

It is an amenable number.

2130405 is a deficient number, since it is larger than the sum of its proper divisors (1312155).

2130405 is a wasteful number, since it uses less digits than its factorization.

2130405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2130405 is about 1459.5906960515. The cubic root of 2130405 is about 128.6729894191.

Adding to 2130405 its reverse (5040312), we get a palindrome (7170717).

The spelling of 2130405 in words is "two million, one hundred thirty thousand, four hundred five".