270139561 has 4 divisors (see below), whose sum is σ = 270172800. Its totient is φ = 270106324.

The previous prime is 270139559. The next prime is 270139579. The reversal of 270139561 is 165931072.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 270139561 - 2¹ = 270139559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (270133561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4620 + ... + 23698.

It is an arithmetic number, because the mean of its divisors is an integer number (67543200).

Almost surely, 2^270139561 is an apocalyptic number.

It is an amenable number.

270139561 is a deficient number, since it is larger than the sum of its proper divisors (33239).

270139561 is a wasteful number, since it uses less digits than its factorization.

270139561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33238.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 270139561 is about 16435.9228825156. The cubic root of 270139561 is about 646.4417489611.

The spelling of 270139561 in words is "two hundred seventy million, one hundred thirty-nine thousand, five hundred sixty-one".