1245533151123 has 40 divisors (see below), whose sum is σ = 1886433753600. Its totient is φ = 818880112512.

The previous prime is 1245533151119. The next prime is 1245533151127. The reversal of 1245533151123 is 3211513355421.

It is a happy number.

1245533151123 is a `hidden beast` number, since 1 + 2 + 4 + 5 + 533 + 1 + 5 + 112 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1245533151119) and next prime (1245533151127).

It is not a de Polignac number, because 1245533151123 - 2² = 1245533151119 is a prime.

It is a super-2 number, since 2×1245533151123² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1245533151127) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2535493 + ... + 2986601.

It is an arithmetic number, because the mean of its divisors is an integer number (47160843840).

Almost surely, 2^{1245533151123} is an apocalyptic number.

1245533151123 is a deficient number, since it is larger than the sum of its proper divisors (640900602477).

1245533151123 is an equidigital number, since it uses as much as digits as its factorization.

1245533151123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451593 (or 451584 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The spelling of 1245533151123 in words is "one trillion, two hundred forty-five billion, five hundred thirty-three million, one hundred fifty-one thousand, one hundred twenty-three".