1231502542045 has 8 divisors (see below), whose sum is σ = 1483553258424. Its totient is φ = 981368561664.

The previous prime is 1231502542027. The next prime is 1231502542087. The reversal of 1231502542045 is 5402452051321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 247728184729 + 983774357316 = 497723^2 + 991854^2 .

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-1231502542045 is a prime.

It is a super-2 number, since 2×1231502542045² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231502542045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479182584 + ... + 479185153.

It is an arithmetic number, because the mean of its divisors is an integer number (185444157303).

Almost surely, 2^{1231502542045} is an apocalyptic number.

It is an amenable number.

1231502542045 is a deficient number, since it is larger than the sum of its proper divisors (252050716379).

1231502542045 is an equidigital number, since it uses as much as digits as its factorization.

1231502542045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958367999.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 1231502542045 its reverse (5402452051321), we get a palindrome (6633954593366).

The spelling of 1231502542045 in words is "one trillion, two hundred thirty-one billion, five hundred two million, five hundred forty-two thousand, forty-five".