1265401731360 has 192 divisors, whose sum is σ = 4305376962432. Its totient is φ = 310558703616.

The previous prime is 1265401731353. The next prime is 1265401731397. The reversal of 1265401731360 is 631371045621.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1802007 + ... + 2403753.

It is an arithmetic number, because the mean of its divisors is an integer number (22423838346).

Almost surely, 2^{1265401731360} is an apocalyptic number.

1265401731360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265401731360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152688481216).

1265401731360 is an abundant number, since it is smaller than the sum of its proper divisors (3039975231072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265401731360 is a wasteful number, since it uses less digits than its factorization.

1265401731360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602115 (or 602107 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

Adding to 1265401731360 its reverse (631371045621), we get a palindrome (1896772776981).

The spelling of 1265401731360 in words is "one trillion, two hundred sixty-five billion, four hundred one million, seven hundred thirty-one thousand, three hundred sixty".