1139985425401 has 3 divisors (see below), whose sum is σ = 1139986493103. Its totient is φ = 1139984357700.

The previous prime is 1139985425311. The next prime is 1139985425407. The reversal of 1139985425401 is 1045245899311.

The square root of 1139985425401 is 1067701.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 688320781801 + 451664643600 = 829651^2 + 672060^2 .

It is not a de Polignac number, because 1139985425401 - 2⁷ = 1139985425273 is a prime.

It is a super-5 number, since 5×1139985425401⁵ (a number of 61 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1139985425407) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 533851 + ... + 1601551.

It is an arithmetic number, because the mean of its divisors is an integer number (379995497701).

Almost surely, 2^{1139985425401} is an apocalyptic number.

1139985425401 is the 1067701-st square number.

1139985425401 is the 533851-st centered octagonal number.

It is an amenable number.

1139985425401 is a deficient number, since it is larger than the sum of its proper divisors (1067702).

1139985425401 is an frugal number, since it uses more digits than its factorization.

1139985425401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135402 (or 1067701 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 1139985425401 in words is "one trillion, one hundred thirty-nine billion, nine hundred eighty-five million, four hundred twenty-five thousand, four hundred one".