1256166054 has 48 divisors (see below), whose sum is σ = 3197520144. Its totient is φ = 351374400.

The previous prime is 1256166047. The next prime is 1256166083. The reversal of 1256166054 is 4506616521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241437 + ... + 246584.

It is an arithmetic number, because the mean of its divisors is an integer number (66615003).

Almost surely, 2^1256166054 is an apocalyptic number.

1256166054 is an abundant number, since it is smaller than the sum of its proper divisors (1941354090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256166054 is a wasteful number, since it uses less digits than its factorization.

1256166054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488053 (or 488050 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1256166054 is about 35442.4329582494. The cubic root of 1256166054 is about 1078.9856886266.

The spelling of 1256166054 in words is "one billion, two hundred fifty-six million, one hundred sixty-six thousand, fifty-four".