1201258657 has 2 divisors, whose sum is σ = 1201258658. Its totient is φ = 1201258656.

The previous prime is 1201258637. The next prime is 1201258739. The reversal of 1201258657 is 7568521021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605947456 + 595311201 = 24616^2 + 24399^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201258657 - 2²⁷ = 1067040929 is a prime.

It is a super-2 number, since 2×1201258657² = 2886044722034887298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1201258637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600629328 + 600629329.

It is an arithmetic number, because the mean of its divisors is an integer number (600629329).

Almost surely, 2^1201258657 is an apocalyptic number.

It is an amenable number.

1201258657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201258657 is an equidigital number, since it uses as much as digits as its factorization.

1201258657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1201258657 is about 34659.1785390248. The cubic root of 1201258657 is about 1063.0299734285.

Adding to 1201258657 its reverse (7568521021), we get a palindrome (8769779678).

The spelling of 1201258657 in words is "one billion, two hundred one million, two hundred fifty-eight thousand, six hundred fifty-seven".