3140405 has 8 divisors (see below), whose sum is σ = 3780000. Its totient is φ = 2504656.

The previous prime is 3140369. The next prime is 3140407. The reversal of 3140405 is 5040413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3140405 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3140407) 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, 1346 + ... + 2844.

It is an arithmetic number, because the mean of its divisors is an integer number (472500).

Almost surely, 2^3140405 is an apocalyptic number.

It is an amenable number.

3140405 is a deficient number, since it is larger than the sum of its proper divisors (639595).

3140405 is a wasteful number, since it uses less digits than its factorization.

3140405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 3140405 is about 1772.1187883435. The cubic root of 3140405 is about 146.4407305277.

Adding to 3140405 its reverse (5040413), we get a palindrome (8180818).

The spelling of 3140405 in words is "three million, one hundred forty thousand, four hundred five".