1261948607 has 8 divisors (see below), whose sum is σ = 1353096000. Its totient is φ = 1172680704.

The previous prime is 1261948577. The next prime is 1261948609. The reversal of 1261948607 is 7068491621.

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 1261948607 - 2¹² = 1261944511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261948609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468482 + ... + 471167.

It is an arithmetic number, because the mean of its divisors is an integer number (169137000).

Almost surely, 2^1261948607 is an apocalyptic number.

1261948607 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1261948607 is a deficient number, since it is larger than the sum of its proper divisors (91147393).

1261948607 is an equidigital number, since it uses as much as digits as its factorization.

1261948607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939745.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1261948607 is about 35523.9159862761. The cubic root of 1261948607 is about 1080.6387987576.

The spelling of 1261948607 in words is "one billion, two hundred sixty-one million, nine hundred forty-eight thousand, six hundred seven".