1272522736145 has 8 divisors (see below), whose sum is σ = 1527929258856. Its totient is φ = 1017416871936.

The previous prime is 1272522736139. The next prime is 1272522736181. The reversal of 1272522736145 is 5416372252721.

It can be written as a sum of positive squares in 4 ways, for example, as 14915248384 + 1257607487761 = 122128^2 + 1121431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1272522736145 - 2²⁶ = 1272455627281 is a prime.

It is a super-2 number, since 2×1272522736145² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272522736145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75155312 + ... + 75172241.

It is an arithmetic number, because the mean of its divisors is an integer number (190991157357).

Almost surely, 2^{1272522736145} is an apocalyptic number.

It is an amenable number.

1272522736145 is a deficient number, since it is larger than the sum of its proper divisors (255406522711).

1272522736145 is a wasteful number, since it uses less digits than its factorization.

1272522736145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150329251.

The product of its digits is 1411200, while the sum is 47.

Adding to 1272522736145 its reverse (5416372252721), we get a palindrome (6688894988866).

The spelling of 1272522736145 in words is "one trillion, two hundred seventy-two billion, five hundred twenty-two million, seven hundred thirty-six thousand, one hundred forty-five".