1259999970 has 64 divisors (see below), whose sum is σ = 3107414016. Its totient is φ = 326820800.

The previous prime is 1259999969. The next prime is 1259999977. The reversal of 1259999970 is 799999521.

It is not an unprimeable number, because it can be changed into a prime (1259999977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232795 + ... + 238145.

It is an arithmetic number, because the mean of its divisors is an integer number (48553344).

Almost surely, 2^1259999970 is an apocalyptic number.

1259999970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1259999970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553707008).

1259999970 is an abundant number, since it is smaller than the sum of its proper divisors (1847414046).

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

1259999970 is a wasteful number, since it uses less digits than its factorization.

1259999970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5575.

The product of its (nonzero) digits is 4133430, while the sum is 60.

The square root of 1259999970 is about 35496.4782760206. The cubic root of 1259999970 is about 1080.0822896832.

The spelling of 1259999970 in words is "one billion, two hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred seventy".