1245523004531 has 4 divisors (see below), whose sum is σ = 1341332466432. Its totient is φ = 1149713542632.

The previous prime is 1245523004521. The next prime is 1245523004533. The reversal of 1245523004531 is 1354003255421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245523004531 is a prime.

It is a super-2 number, since 2×1245523004531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245523004491 and 1245523004500.

It is not an unprimeable number, because it can be changed into a prime (1245523004533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47904730931 + ... + 47904730956.

It is an arithmetic number, because the mean of its divisors is an integer number (335333116608).

Almost surely, 2^{1245523004531} is an apocalyptic number.

1245523004531 is a deficient number, since it is larger than the sum of its proper divisors (95809461901).

1245523004531 is an equidigital number, since it uses as much as digits as its factorization.

1245523004531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95809461900.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 1245523004531 its reverse (1354003255421), we get a palindrome (2599526259952).

The spelling of 1245523004531 in words is "one trillion, two hundred forty-five billion, five hundred twenty-three million, four thousand, five hundred thirty-one".