1242901671025 has 81 divisors (see below), whose sum is σ = 1830332794563. Its totient is φ = 834803424000.

The previous prime is 1242901671013. The next prime is 1242901671061. The reversal of 1242901671025 is 5201761092421.

The square root of 1242901671025 is 1114855.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 125889426481 + 1117012244544 = 354809^2 + 1056888^2 .

It is not a de Polignac number, because 1242901671025 - 2¹⁵ = 1242901638257 is a prime.

It is an unprimeable number.

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 80 ways as a sum of consecutive naturals, for example, 2068055725 + ... + 2068056325.

Almost surely, 2^{1242901671025} is an apocalyptic number.

1242901671025 is the 1114855-th square number.

1242901671025 is the 557428-th centered octagonal number.

It is an amenable number.

1242901671025 is a deficient number, since it is larger than the sum of its proper divisors (587431123538).

1242901671025 is an frugal number, since it uses more digits than its factorization.

1242901671025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 1242901671025 in words is "one trillion, two hundred forty-two billion, nine hundred one million, six hundred seventy-one thousand, twenty-five".