2101257 has 12 divisors (see below), whose sum is σ = 3167424. Its totient is φ = 1339800.

The previous prime is 2101249. The next prime is 2101259. The reversal of 2101257 is 7521012.

It is not a de Polignac number, because 2101257 - 2³ = 2101249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101259) 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, 4869 + ... + 5282.

It is an arithmetic number, because the mean of its divisors is an integer number (263952).

2^2101257 is an apocalyptic number.

It is an amenable number.

2101257 is a deficient number, since it is larger than the sum of its proper divisors (1066167).

2101257 is a wasteful number, since it uses less digits than its factorization.

2101257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180 (or 10177 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2101257 is about 1449.5713159414. The cubic root of 2101257 is about 128.0834620058.

Adding to 2101257 its reverse (7521012), we get a palindrome (9622269).

The spelling of 2101257 in words is "two million, one hundred one thousand, two hundred fifty-seven".