1262051261 has 16 divisors (see below), whose sum is σ = 1357655040. Its totient is φ = 1170503040.

The previous prime is 1262051233. The next prime is 1262051267. The reversal of 1262051261 is 1621502621.

It is a cyclic number.

It is not a de Polignac number, because 1262051261 - 2¹⁸ = 1261789117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1262051261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1262051267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118040 + ... + 128286.

It is an arithmetic number, because the mean of its divisors is an integer number (84853440).

Almost surely, 2^1262051261 is an apocalyptic number.

It is an amenable number.

1262051261 is a deficient number, since it is larger than the sum of its proper divisors (95603779).

1262051261 is a wasteful number, since it uses less digits than its factorization.

1262051261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10444.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1262051261 is about 35525.3608144942. The cubic root of 1262051261 is about 1080.6680997098.

Adding to 1262051261 its reverse (1621502621), we get a palindrome (2883553882).

The spelling of 1262051261 in words is "one billion, two hundred sixty-two million, fifty-one thousand, two hundred sixty-one".