1273601985 has 32 divisors (see below), whose sum is σ = 2108021760. Its totient is φ = 655929600.

The previous prime is 1273601969. The next prime is 1273602013. The reversal of 1273601985 is 5891063721.

It is not a de Polignac number, because 1273601985 - 2⁴ = 1273601969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233995 + ... + 239375.

It is an arithmetic number, because the mean of its divisors is an integer number (65875680).

Almost surely, 2^1273601985 is an apocalyptic number.

1273601985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1273601985 is a deficient number, since it is larger than the sum of its proper divisors (834419775).

1273601985 is a wasteful number, since it uses less digits than its factorization.

1273601985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5929.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1273601985 is about 35687.5606479345. The cubic root of 1273601985 is about 1083.9549736089.

The spelling of 1273601985 in words is "one billion, two hundred seventy-three million, six hundred one thousand, nine hundred eighty-five".