1215397127 has 12 divisors (see below), whose sum is σ = 1452043080. Its totient is φ = 1013611536.

The previous prime is 1215397121. The next prime is 1215397159. The reversal of 1215397127 is 7217935121.

It is not a de Polignac number, because 1215397127 - 2¹² = 1215393031 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 (1215397121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333377 + ... + 337002.

It is an arithmetic number, because the mean of its divisors is an integer number (121003590).

Almost surely, 2^1215397127 is an apocalyptic number.

1215397127 is a deficient number, since it is larger than the sum of its proper divisors (236645953).

1215397127 is an equidigital number, since it uses as much as digits as its factorization.

1215397127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670430 (or 670423 counting only the distinct ones).

The product of its digits is 26460, while the sum is 38.

The square root of 1215397127 is about 34862.5461921530. The cubic root of 1215397127 is about 1067.1842369847.

The spelling of 1215397127 in words is "one billion, two hundred fifteen million, three hundred ninety-seven thousand, one hundred twenty-seven".