1256170002 has 16 divisors (see below), whose sum is σ = 2549838432. Its totient is φ = 412473600.

The previous prime is 1256169991. The next prime is 1256170007. The reversal of 1256170002 is 2000716521.

It is not an unprimeable number, because it can be changed into a prime (1256170007) 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, 1561999 + ... + 1562802.

It is an arithmetic number, because the mean of its divisors is an integer number (159364902).

Almost surely, 2^1256170002 is an apocalyptic number.

1256170002 is an abundant number, since it is smaller than the sum of its proper divisors (1293668430).

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

1256170002 is a wasteful number, since it uses less digits than its factorization.

1256170002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124873.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 1256170002 is about 35442.4886541563. The cubic root of 1256170002 is about 1078.9868190056.

Adding to 1256170002 its reverse (2000716521), we get a palindrome (3256886523).

The spelling of 1256170002 in words is "one billion, two hundred fifty-six million, one hundred seventy thousand, two".