1254638459572 has 12 divisors (see below), whose sum is σ = 2254958312740. Its totient is φ = 610364655936.

The previous prime is 1254638459507. The next prime is 1254638459579. The reversal of 1254638459572 is 2759548364521.

It can be written as a sum of positive squares in 2 ways, for example, as 929457959056 + 325180500516 = 964084^2 + 570246^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1254638459572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254638459579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4238643297 + ... + 4238643592.

Almost surely, 2^{1254638459572} is an apocalyptic number.

It is an amenable number.

1254638459572 is a deficient number, since it is larger than the sum of its proper divisors (1000319853168).

1254638459572 is a wasteful number, since it uses less digits than its factorization.

1254638459572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477286930 (or 8477286928 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 61.

The spelling of 1254638459572 in words is "one trillion, two hundred fifty-four billion, six hundred thirty-eight million, four hundred fifty-nine thousand, five hundred seventy-two".