1261435002 has 16 divisors (see below), whose sum is σ = 2523954720. Its totient is φ = 420297552.

The previous prime is 1261434989. The next prime is 1261435073. The reversal of 1261435002 is 2005341621.

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 7 ways as a sum of consecutive naturals, for example, 29668 + ... + 58335.

It is an arithmetic number, because the mean of its divisors is an integer number (157747170).

Almost surely, 2^1261435002 is an apocalyptic number.

1261435002 is an abundant number, since it is smaller than the sum of its proper divisors (1262519718).

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

1261435002 is a wasteful number, since it uses less digits than its factorization.

1261435002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90397.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1261435002 is about 35516.6862474528. The cubic root of 1261435002 is about 1080.4921745076.

Adding to 1261435002 its reverse (2005341621), we get a palindrome (3266776623).

The spelling of 1261435002 in words is "one billion, two hundred sixty-one million, four hundred thirty-five thousand, two".