1257233285 has 16 divisors (see below), whose sum is σ = 1880952192. Its totient is φ = 783729600.

The previous prime is 1257233267. The next prime is 1257233293. The reversal of 1257233285 is 5823327521.

It is not a de Polignac number, because 1257233285 - 2¹⁴ = 1257216901 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632386 + ... + 1633155.

It is an arithmetic number, because the mean of its divisors is an integer number (117559512).

Almost surely, 2^1257233285 is an apocalyptic number.

It is an amenable number.

1257233285 is a deficient number, since it is larger than the sum of its proper divisors (623718907).

1257233285 is a wasteful number, since it uses less digits than its factorization.

1257233285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265564.

The product of its digits is 100800, while the sum is 38.

The square root of 1257233285 is about 35457.4855989536. The cubic root of 1257233285 is about 1079.2911686799.

The spelling of 1257233285 in words is "one billion, two hundred fifty-seven million, two hundred thirty-three thousand, two hundred eighty-five".