1245430421524 has 6 divisors (see below), whose sum is σ = 2179503237674. Its totient is φ = 622715210760.

The previous prime is 1245430421519. The next prime is 1245430421537. The reversal of 1245430421524 is 4251240345421.

It can be written as a sum of positive squares in only one way, i.e., 1143744691600 + 101685729924 = 1069460^2 + 318882^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155678802687 + ... + 155678802694.

Almost surely, 2^{1245430421524} is an apocalyptic number.

It is an amenable number.

1245430421524 is a deficient number, since it is larger than the sum of its proper divisors (934072816150).

1245430421524 is a wasteful number, since it uses less digits than its factorization.

1245430421524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311357605385 (or 311357605383 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 1245430421524 its reverse (4251240345421), we get a palindrome (5496670766945).

The spelling of 1245430421524 in words is "one trillion, two hundred forty-five billion, four hundred thirty million, four hundred twenty-one thousand, five hundred twenty-four".