2349981 has 12 divisors (see below), whose sum is σ = 3486652. Its totient is φ = 1524096.

The previous prime is 2349973. The next prime is 2350001. The reversal of 2349981 is 1899432.

It can be written as a sum of positive squares in 2 ways, for example, as 2277081 + 72900 = 1509^2 + 270^2 .

It is not a de Polignac number, because 2349981 - 2³ = 2349973 is a prime.

It is a super-2 number, since 2×2349981² = 11044821400722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2349181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3196 + ... + 3861.

2^2349981 is an apocalyptic number.

It is an amenable number.

2349981 is a deficient number, since it is larger than the sum of its proper divisors (1136671).

2349981 is a wasteful number, since it uses less digits than its factorization.

2349981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100 (or 7097 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 2349981 is about 1532.9647745464. The cubic root of 2349981 is about 132.9499312167.

The spelling of 2349981 in words is "two million, three hundred forty-nine thousand, nine hundred eighty-one".