2103957 has 12 divisors (see below), whose sum is σ = 3060460. Its totient is φ = 1392768.

The previous prime is 2103953. The next prime is 2103961. The reversal of 2103957 is 7593012.

It is an interprime number because it is at equal distance from previous prime (2103953) and next prime (2103961).

It can be written as a sum of positive squares in 2 ways, for example, as 531441 + 1572516 = 729^2 + 1254^2 .

It is not a de Polignac number, because 2103957 - 2² = 2103953 is a prime.

It is an Ulam number.

It is a Duffinian number.

2103957 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2103957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103953) 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, 669 + ... + 2157.

2^2103957 is an apocalyptic number.

It is an amenable number.

2103957 is a deficient number, since it is larger than the sum of its proper divisors (956503).

2103957 is a wasteful number, since it uses less digits than its factorization.

2103957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 2103957 is about 1450.5023267820. The cubic root of 2103957 is about 128.1382985998.

Adding to 2103957 its reverse (7593012), we get a palindrome (9696969).

The spelling of 2103957 in words is "two million, one hundred three thousand, nine hundred fifty-seven".