1299497615 has 12 divisors (see below), whose sum is σ = 1688579064. Its totient is φ = 959628384.

The previous prime is 1299497567. The next prime is 1299497653. The reversal of 1299497615 is 5167949921.

It is not a de Polignac number, because 1299497615 - 2¹² = 1299493519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 768089 + ... + 769778.

It is an arithmetic number, because the mean of its divisors is an integer number (140714922).

Almost surely, 2^1299497615 is an apocalyptic number.

1299497615 is a deficient number, since it is larger than the sum of its proper divisors (389081449).

1299497615 is a wasteful number, since it uses less digits than its factorization.

1299497615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537898 (or 1537885 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 53.

The square root of 1299497615 is about 36048.5452549753. The cubic root of 1299497615 is about 1091.2522753537.

The spelling of 1299497615 in words is "one billion, two hundred ninety-nine million, four hundred ninety-seven thousand, six hundred fifteen".