1024621261 has 2 divisors, whose sum is σ = 1024621262. Its totient is φ = 1024621260.

The previous prime is 1024621249. The next prime is 1024621307. The reversal of 1024621261 is 1621264201.

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., 980065636 + 44555625 = 31306^2 + 6675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024621261 - 2¹⁹ = 1024096973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1024621361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512310630 + 512310631.

It is an arithmetic number, because the mean of its divisors is an integer number (512310631).

Almost surely, 2^1024621261 is an apocalyptic number.

It is an amenable number.

1024621261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024621261 is an equidigital number, since it uses as much as digits as its factorization.

1024621261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1024621261 is about 32009.7057312310. The cubic root of 1024621261 is about 1008.1406371994.

Adding to 1024621261 its reverse (1621264201), we get a palindrome (2645885462).

The spelling of 1024621261 in words is "one billion, twenty-four million, six hundred twenty-one thousand, two hundred sixty-one".