1255121061 has 8 divisors (see below), whose sum is σ = 1686672384. Its totient is φ = 830158560.

The previous prime is 1255121039. The next prime is 1255121083. The reversal of 1255121061 is 1601215521.

It is an interprime number because it is at equal distance from previous prime (1255121039) and next prime (1255121083).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1255121061 - 2⁵ = 1255121029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255121261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1646760 + ... + 1647521.

It is an arithmetic number, because the mean of its divisors is an integer number (210834048).

Almost surely, 2^1255121061 is an apocalyptic number.

It is an amenable number.

1255121061 is a deficient number, since it is larger than the sum of its proper divisors (431551323).

1255121061 is a wasteful number, since it uses less digits than its factorization.

1255121061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294411.

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 1255121061 is about 35427.6877738302. The cubic root of 1255121061 is about 1078.6864061939.

Adding to 1255121061 its reverse (1601215521), we get a palindrome (2856336582).

The spelling of 1255121061 in words is "one billion, two hundred fifty-five million, one hundred twenty-one thousand, sixty-one".