158277257 has 2 divisors, whose sum is σ = 158277258. Its totient is φ = 158277256.

The previous prime is 158277241. The next prime is 158277269. The reversal of 158277257 is 752772851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125798656 + 32478601 = 11216^2 + 5699^2 .

It is an emirp because it is prime and its reverse (752772851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158277257 - 2⁴ = 158277241 is a prime.

It is not a weakly prime, because it can be changed into another prime (158270257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79138628 + 79138629.

It is an arithmetic number, because the mean of its divisors is an integer number (79138629).

Almost surely, 2^158277257 is an apocalyptic number.

It is an amenable number.

158277257 is a deficient number, since it is larger than the sum of its proper divisors (1).

158277257 is an equidigital number, since it uses as much as digits as its factorization.

158277257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 274400, while the sum is 44.

The square root of 158277257 is about 12580.8289472514. The cubic root of 158277257 is about 540.9280531810.

The spelling of 158277257 in words is "one hundred fifty-eight million, two hundred seventy-seven thousand, two hundred fifty-seven".