1245402400523 has 8 divisors (see below), whose sum is σ = 1245763056720. Its totient is φ = 1245041811360.

The previous prime is 1245402400499. The next prime is 1245402400531. The reversal of 1245402400523 is 3250042045421.

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

It is a cyclic number.

It is not a de Polignac number, because 1245402400523 - 2²² = 1245398206219 is a prime.

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 1245402400523.

It is not an unprimeable number, because it can be changed into a prime (1245402000523) 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, 82595261 + ... + 82610337.

It is an arithmetic number, because the mean of its divisors is an integer number (155720382090).

Almost surely, 2^{1245402400523} is an apocalyptic number.

1245402400523 is a deficient number, since it is larger than the sum of its proper divisors (360656197).

1245402400523 is a wasteful number, since it uses less digits than its factorization.

1245402400523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33517.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 1245402400523 its reverse (3250042045421), we get a palindrome (4495444445944).

The spelling of 1245402400523 in words is "one trillion, two hundred forty-five billion, four hundred two million, four hundred thousand, five hundred twenty-three".