1501120261 has 2 divisors, whose sum is σ = 1501120262. Its totient is φ = 1501120260.

The previous prime is 1501120237. The next prime is 1501120267. The reversal of 1501120261 is 1620211051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 901800900 + 599319361 = 30030^2 + 24481^2 .

It is an emirp because it is prime and its reverse (1620211051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1501120261 - 2⁷ = 1501120133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1501120267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750560130 + 750560131.

It is an arithmetic number, because the mean of its divisors is an integer number (750560131).

Almost surely, 2^1501120261 is an apocalyptic number.

It is an amenable number.

1501120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501120261 is an equidigital number, since it uses as much as digits as its factorization.

1501120261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1501120261 is about 38744.2932701062. The cubic root of 1501120261 is about 1144.9991446889. Note that the first 3 decimals are identical.

The spelling of 1501120261 in words is "one billion, five hundred one million, one hundred twenty thousand, two hundred sixty-one".