1245120272415 has 80 divisors (see below), whose sum is σ = 2284608430368. Its totient is φ = 648419675904.

The previous prime is 1245120272413. The next prime is 1245120272441. The reversal of 1245120272415 is 5142720215421.

1245120272415 is a `hidden beast` number, since 12 + 45 + 120 + 2 + 72 + 415 = 666.

It is not a de Polignac number, because 1245120272415 - 2¹ = 1245120272413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1245120272415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245120272413) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 68205429 + ... + 68223681.

Almost surely, 2^{1245120272415} is an apocalyptic number.

1245120272415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1245120272415 is a deficient number, since it is larger than the sum of its proper divisors (1039488157953).

1245120272415 is a wasteful number, since it uses less digits than its factorization.

1245120272415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22230 (or 22221 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

Adding to 1245120272415 its reverse (5142720215421), we get a palindrome (6387840487836).

The spelling of 1245120272415 in words is "one trillion, two hundred forty-five billion, one hundred twenty million, two hundred seventy-two thousand, four hundred fifteen".