1015121260545 has 32 divisors (see below), whose sum is σ = 1856527153920. Its totient is φ = 463979078400.

The previous prime is 1015121260537. The next prime is 1015121260547. The reversal of 1015121260545 is 5450621215101.

It is a happy number.

It is not a de Polignac number, because 1015121260545 - 2³ = 1015121260537 is a prime.

It is a super-2 number, since 2×1015121260545² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1015121260547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151710 + ... + 1432919.

It is an arithmetic number, because the mean of its divisors is an integer number (58016473560).

Almost surely, 2^{1015121260545} is an apocalyptic number.

1015121260545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1015121260545 is a deficient number, since it is larger than the sum of its proper divisors (841405893375).

1015121260545 is a wasteful number, since it uses less digits than its factorization.

1015121260545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590745.

The product of its (nonzero) digits is 12000, while the sum is 33.

Adding to 1015121260545 its reverse (5450621215101), we get a palindrome (6465742475646).

The spelling of 1015121260545 in words is "one trillion, fifteen billion, one hundred twenty-one million, two hundred sixty thousand, five hundred forty-five".