1260940039 has 4 divisors (see below), whose sum is σ = 1304420760. Its totient is φ = 1217459320.

The previous prime is 1260940033. The next prime is 1260940103. The reversal of 1260940039 is 9300490621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1260940039 - 2²¹ = 1258842887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1260939986 and 1260940013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260940033) 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, 21740317 + ... + 21740374.

It is an arithmetic number, because the mean of its divisors is an integer number (326105190).

Almost surely, 2^1260940039 is an apocalyptic number.

1260940039 is a deficient number, since it is larger than the sum of its proper divisors (43480721).

1260940039 is an equidigital number, since it uses as much as digits as its factorization.

1260940039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43480720.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1260940039 is about 35509.7175291497. The cubic root of 1260940039 is about 1080.3508345227.

The spelling of 1260940039 in words is "one billion, two hundred sixty million, nine hundred forty thousand, thirty-nine".