1301629261 has 2 divisors, whose sum is σ = 1301629262. Its totient is φ = 1301629260.

The previous prime is 1301629247. The next prime is 1301629289. The reversal of 1301629261 is 1629261031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1202008900 + 99620361 = 34670^2 + 9981^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301629261 - 2¹⁵ = 1301596493 is a prime.

It is a super-2 number, since 2×1301629261² = 3388477466182812242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301629061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650814630 + 650814631.

It is an arithmetic number, because the mean of its divisors is an integer number (650814631).

Almost surely, 2^1301629261 is an apocalyptic number.

It is an amenable number.

1301629261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301629261 is an equidigital number, since it uses as much as digits as its factorization.

1301629261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1301629261 is about 36078.0994649108. The cubic root of 1301629261 is about 1091.8486321720.

The spelling of 1301629261 in words is "one billion, three hundred one million, six hundred twenty-nine thousand, two hundred sixty-one".