2981405 has 24 divisors (see below), whose sum is σ = 4273632. Its totient is φ = 1989792.

The previous prime is 2981401. The next prime is 2981417. The reversal of 2981405 is 5041892.

It is not a de Polignac number, because 2981405 - 2² = 2981401 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 (2981401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10394 + ... + 10676.

It is an arithmetic number, because the mean of its divisors is an integer number (178068).

2^2981405 is an apocalyptic number.

It is an amenable number.

2981405 is a deficient number, since it is larger than the sum of its proper divisors (1292227).

2981405 is a wasteful number, since it uses less digits than its factorization.

2981405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2981405 is about 1726.6745495316. The cubic root of 2981405 is about 143.9263544460.

The spelling of 2981405 in words is "two million, nine hundred eighty-one thousand, four hundred five".