1205752157 has 2 divisors, whose sum is σ = 1205752158. Its totient is φ = 1205752156.

The previous prime is 1205752139. The next prime is 1205752181. The reversal of 1205752157 is 7512575021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1154572441 + 51179716 = 33979^2 + 7154^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205752157 - 2¹⁶ = 1205686621 is a prime.

It is a super-2 number, since 2×1205752157² = 2907676528220305298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205752117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602876078 + 602876079.

It is an arithmetic number, because the mean of its divisors is an integer number (602876079).

Almost surely, 2^1205752157 is an apocalyptic number.

It is an amenable number.

1205752157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205752157 is an equidigital number, since it uses as much as digits as its factorization.

1205752157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24500, while the sum is 35.

The square root of 1205752157 is about 34723.9421293148. The cubic root of 1205752157 is about 1064.3538019728.

The spelling of 1205752157 in words is "one billion, two hundred five million, seven hundred fifty-two thousand, one hundred fifty-seven".