1215403403 has 2 divisors, whose sum is σ = 1215403404. Its totient is φ = 1215403402.

The previous prime is 1215403339. The next prime is 1215403429. The reversal of 1215403403 is 3043045121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215403403 - 2⁶ = 1215403339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215403463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607701701 + 607701702.

It is an arithmetic number, because the mean of its divisors is an integer number (607701702).

Almost surely, 2^1215403403 is an apocalyptic number.

1215403403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215403403 is an equidigital number, since it uses as much as digits as its factorization.

1215403403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1215403403 is about 34862.6362026741. The cubic root of 1215403403 is about 1067.1860738704.

Adding to 1215403403 its reverse (3043045121), we get a palindrome (4258448524).

The spelling of 1215403403 in words is "one billion, two hundred fifteen million, four hundred three thousand, four hundred three".