1338242581 has 8 divisors (see below), whose sum is σ = 1443567104. Its totient is φ = 1233258480.

The previous prime is 1338242579. The next prime is 1338242593. The reversal of 1338242581 is 1852428331.

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 1338242581 - 2¹ = 1338242579 is a prime.

It is a super-2 number, since 2×1338242581² = 3581786411203083122, which contains 22 as substring.

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 1338242581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338242531) 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, 76905 + ... + 92686.

It is an arithmetic number, because the mean of its divisors is an integer number (180445888).

Almost surely, 2^1338242581 is an apocalyptic number.

It is an amenable number.

1338242581 is a deficient number, since it is larger than the sum of its proper divisors (105324523).

1338242581 is a wasteful number, since it uses less digits than its factorization.

1338242581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170211.

The product of its digits is 46080, while the sum is 37.

The square root of 1338242581 is about 36581.9980454868. The cubic root of 1338242581 is about 1101.9915933430.

The spelling of 1338242581 in words is "one billion, three hundred thirty-eight million, two hundred forty-two thousand, five hundred eighty-one".