2142557 has 2 divisors, whose sum is σ = 2142558. Its totient is φ = 2142556.

The previous prime is 2142551. The next prime is 2142577. The reversal of 2142557 is 7552412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1705636 + 436921 = 1306^2 + 661^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142557 - 2⁴ = 2142541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071278 + 1071279.

It is an arithmetic number, because the mean of its divisors is an integer number (1071279).

2^2142557 is an apocalyptic number.

It is an amenable number.

2142557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142557 is an equidigital number, since it uses as much as digits as its factorization.

2142557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2800, while the sum is 26.

The square root of 2142557 is about 1463.7475875300. The cubic root of 2142557 is about 128.9171793770.

Adding to 2142557 its reverse (7552412), we get a palindrome (9694969).

The spelling of 2142557 in words is "two million, one hundred forty-two thousand, five hundred fifty-seven".