1261485029 has 8 divisors (see below), whose sum is σ = 1472371968. Its totient is φ = 1058266800.

The previous prime is 1261485019. The next prime is 1261485037. The reversal of 1261485029 is 9205841621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1261485029 - 2⁸ = 1261484773 is a prime.

It is a super-2 number, since 2×1261485029² = 3182688956782261682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1261484983 and 1261485001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261485019) 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 in 7 ways as a sum of consecutive naturals, for example, 1916822 + ... + 1917479.

It is an arithmetic number, because the mean of its divisors is an integer number (184046496).

Almost surely, 2^1261485029 is an apocalyptic number.

It is an amenable number.

1261485029 is a deficient number, since it is larger than the sum of its proper divisors (210886939).

1261485029 is an equidigital number, since it uses as much as digits as its factorization.

1261485029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834355.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1261485029 is about 35517.3905150702. The cubic root of 1261485029 is about 1080.5064579936.

The spelling of 1261485029 in words is "one billion, two hundred sixty-one million, four hundred eighty-five thousand, twenty-nine".