4156249 has 2 divisors, whose sum is σ = 4156250. Its totient is φ = 4156248.

The previous prime is 4156219. The next prime is 4156277. The reversal of 4156249 is 9426514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4129024 + 27225 = 2032^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 4156249 - 2¹³ = 4148057 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4156249.

It is not a weakly prime, because it can be changed into another prime (4156219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2078124 + 2078125.

It is an arithmetic number, because the mean of its divisors is an integer number (2078125).

Almost surely, 2^4156249 is an apocalyptic number.

It is an amenable number.

4156249 is a deficient number, since it is larger than the sum of its proper divisors (1).

4156249 is an equidigital number, since it uses as much as digits as its factorization.

4156249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 4156249 is about 2038.6880585318. The cubic root of 4156249 is about 160.7806768898.

The spelling of 4156249 in words is "four million, one hundred fifty-six thousand, two hundred forty-nine".