1260616615 has 4 divisors (see below), whose sum is σ = 1512739944. Its totient is φ = 1008493288.

The previous prime is 1260616613. The next prime is 1260616639. The reversal of 1260616615 is 5166160621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5166160621 = 109 ⋅47395969.

It is a cyclic number.

It is not a de Polignac number, because 1260616615 - 2¹ = 1260616613 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 (1260616613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126061657 + ... + 126061666.

It is an arithmetic number, because the mean of its divisors is an integer number (378184986).

Almost surely, 2^1260616615 is an apocalyptic number.

1260616615 is a deficient number, since it is larger than the sum of its proper divisors (252123329).

1260616615 is an equidigital number, since it uses as much as digits as its factorization.

1260616615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252123328.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1260616615 is about 35505.1632160732. The cubic root of 1260616615 is about 1080.2584586614.

The spelling of 1260616615 in words is "one billion, two hundred sixty million, six hundred sixteen thousand, six hundred fifteen".