1261010216 has 16 divisors (see below), whose sum is σ = 2399684640. Its totient is φ = 621094320.

The previous prime is 1261010203. The next prime is 1261010293. The reversal of 1261010216 is 6120101621.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175780 + ... + 1176851.

It is an arithmetic number, because the mean of its divisors is an integer number (149980290).

Almost surely, 2^1261010216 is an apocalyptic number.

It is an amenable number.

1261010216 is a deficient number, since it is larger than the sum of its proper divisors (1138674424).

1261010216 is a wasteful number, since it uses less digits than its factorization.

1261010216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352704 (or 2352700 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1261010216 is about 35510.7056533660. The cubic root of 1261010216 is about 1080.3708762830.

Adding to 1261010216 its reverse (6120101621), we get a palindrome (7381111837).

The spelling of 1261010216 in words is "one billion, two hundred sixty-one million, ten thousand, two hundred sixteen".