1245115078181 has 8 divisors (see below), whose sum is σ = 1340938126080. Its totient is φ = 1149298453872.

The previous prime is 1245115078139. The next prime is 1245115078183. The reversal of 1245115078181 is 1818705115421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245115078181 is a prime.

It is a super-2 number, since 2×1245115078181² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245115078183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1199501 + ... + 1982178.

It is an arithmetic number, because the mean of its divisors is an integer number (167617265760).

Almost surely, 2^{1245115078181} is an apocalyptic number.

It is an amenable number.

1245115078181 is a deficient number, since it is larger than the sum of its proper divisors (95823047899).

1245115078181 is a wasteful number, since it uses less digits than its factorization.

1245115078181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211795.

The product of its (nonzero) digits is 89600, while the sum is 44.

The spelling of 1245115078181 in words is "one trillion, two hundred forty-five billion, one hundred fifteen million, seventy-eight thousand, one hundred eighty-one".