1265138750139 has 32 divisors (see below), whose sum is σ = 1861076176128. Its totient is φ = 758074800000.

The previous prime is 1265138750137. The next prime is 1265138750173. The reversal of 1265138750139 is 9310578315621.

It is not a de Polignac number, because 1265138750139 - 2¹ = 1265138750137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1265138750091 and 1265138750100.

It is not an unprimeable number, because it can be changed into a prime (1265138750137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2065692 + ... + 2607174.

It is an arithmetic number, because the mean of its divisors is an integer number (58158630504).

Almost surely, 2^{1265138750139} is an apocalyptic number.

1265138750139 is a deficient number, since it is larger than the sum of its proper divisors (595937425989).

1265138750139 is a wasteful number, since it uses less digits than its factorization.

1265138750139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542299.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 1265138750139 in words is "one trillion, two hundred sixty-five billion, one hundred thirty-eight million, seven hundred fifty thousand, one hundred thirty-nine".