1215862493 has 2 divisors, whose sum is σ = 1215862494. Its totient is φ = 1215862492.

The previous prime is 1215862481. The next prime is 1215862517. The reversal of 1215862493 is 3942685121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1077611929 + 138250564 = 32827^2 + 11758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215862493 - 2⁶ = 1215862429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215862493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215862463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607931246 + 607931247.

It is an arithmetic number, because the mean of its divisors is an integer number (607931247).

Almost surely, 2^1215862493 is an apocalyptic number.

It is an amenable number.

1215862493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215862493 is an equidigital number, since it uses as much as digits as its factorization.

1215862493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 1215862493 is about 34869.2198507509. The cubic root of 1215862493 is about 1067.3204250878.

The spelling of 1215862493 in words is "one billion, two hundred fifteen million, eight hundred sixty-two thousand, four hundred ninety-three".