1273242381 has 8 divisors (see below), whose sum is σ = 1697968704. Its totient is φ = 848672160.

The previous prime is 1273242359. The next prime is 1273242403. The reversal of 1273242381 is 1832423721.

It is an interprime number because it is at equal distance from previous prime (1273242359) and next prime (1273242403).

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

It is not a de Polignac number, because 1273242381 - 2⁷ = 1273242253 is a prime.

It is a super-3 number, since 3×1273242381³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273242301) 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, 18441 + ... + 53726.

It is an arithmetic number, because the mean of its divisors is an integer number (212246088).

Almost surely, 2^1273242381 is an apocalyptic number.

It is an amenable number.

1273242381 is a deficient number, since it is larger than the sum of its proper divisors (424726323).

1273242381 is an equidigital number, since it uses as much as digits as its factorization.

1273242381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78051.

The product of its digits is 16128, while the sum is 33.

The square root of 1273242381 is about 35682.5220661320. The cubic root of 1273242381 is about 1083.8529450733.

The spelling of 1273242381 in words is "one billion, two hundred seventy-three million, two hundred forty-two thousand, three hundred eighty-one".