1282650261 has 4 divisors (see below), whose sum is σ = 1710200352. Its totient is φ = 855100172.

The previous prime is 1282650209. The next prime is 1282650277. The reversal of 1282650261 is 1620562821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1282650261 - 2⁷ = 1282650133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282658261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213775041 + ... + 213775046.

It is an arithmetic number, because the mean of its divisors is an integer number (427550088).

Almost surely, 2^1282650261 is an apocalyptic number.

It is an amenable number.

1282650261 is a deficient number, since it is larger than the sum of its proper divisors (427550091).

1282650261 is an equidigital number, since it uses as much as digits as its factorization.

1282650261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427550090.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1282650261 is about 35814.1070110648. The cubic root of 1282650261 is about 1086.5158962016.

The spelling of 1282650261 in words is "one billion, two hundred eighty-two million, six hundred fifty thousand, two hundred sixty-one".