1255428566 has 16 divisors (see below), whose sum is σ = 2153011104. Its totient is φ = 537828864.

The previous prime is 1255428557. The next prime is 1255428593. The reversal of 1255428566 is 6658245521.

It is a happy number.

It is a super-2 number, since 2×1255428566² = 3152201768657632712, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22256 + ... + 54828.

It is an arithmetic number, because the mean of its divisors is an integer number (134563194).

Almost surely, 2^1255428566 is an apocalyptic number.

1255428566 is a deficient number, since it is larger than the sum of its proper divisors (897582538).

1255428566 is a wasteful number, since it uses less digits than its factorization.

1255428566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35335.

The product of its digits is 576000, while the sum is 44.

The square root of 1255428566 is about 35432.0274045954. The cubic root of 1255428566 is about 1078.7744918212.

The spelling of 1255428566 in words is "one billion, two hundred fifty-five million, four hundred twenty-eight thousand, five hundred sixty-six".