1227281397 has 8 divisors (see below), whose sum is σ = 1640835456. Its totient is φ = 815957472.

The previous prime is 1227281381. The next prime is 1227281417. The reversal of 1227281397 is 7931827221.

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

It is not a de Polignac number, because 1227281397 - 2⁴ = 1227281381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227286397) 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, 556248 + ... + 558449.

It is an arithmetic number, because the mean of its divisors is an integer number (205104432).

Almost surely, 2^1227281397 is an apocalyptic number.

It is an amenable number.

1227281397 is a deficient number, since it is larger than the sum of its proper divisors (413554059).

1227281397 is a wasteful number, since it uses less digits than its factorization.

1227281397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115067.

The product of its digits is 84672, while the sum is 42.

The square root of 1227281397 is about 35032.5762255647. The cubic root of 1227281397 is about 1070.6513043498.

The spelling of 1227281397 in words is "one billion, two hundred twenty-seven million, two hundred eighty-one thousand, three hundred ninety-seven".