1150651261 has 2 divisors, whose sum is σ = 1150651262. Its totient is φ = 1150651260.

The previous prime is 1150651237. The next prime is 1150651297. The reversal of 1150651261 is 1621560511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 819047161 + 331604100 = 28619^2 + 18210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1150651261 - 2¹³ = 1150643069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1150651361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575325630 + 575325631.

It is an arithmetic number, because the mean of its divisors is an integer number (575325631).

Almost surely, 2^1150651261 is an apocalyptic number.

It is an amenable number.

1150651261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1150651261 is an equidigital number, since it uses as much as digits as its factorization.

1150651261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1150651261 is about 33921.2508761101. The cubic root of 1150651261 is about 1047.8872895729.

The spelling of 1150651261 in words is "one billion, one hundred fifty million, six hundred fifty-one thousand, two hundred sixty-one".