2145277 has 2 divisors, whose sum is σ = 2145278. Its totient is φ = 2145276.

The previous prime is 2145263. The next prime is 2145287. The reversal of 2145277 is 7725412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1522756 + 622521 = 1234^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145277 - 2¹⁹ = 1620989 is a prime.

It is a super-5 number, since 5×2145277⁵ (a number of 33 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072638 + 1072639.

It is an arithmetic number, because the mean of its divisors is an integer number (1072639).

2^2145277 is an apocalyptic number.

It is an amenable number.

2145277 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145277 is an equidigital number, since it uses as much as digits as its factorization.

2145277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 28.

The square root of 2145277 is about 1464.6764147756. The cubic root of 2145277 is about 128.9717102398.

The spelling of 2145277 in words is "two million, one hundred forty-five thousand, two hundred seventy-seven".