141523561 has 4 divisors (see below), whose sum is σ = 141611652. Its totient is φ = 141435472.

The previous prime is 141523559. The next prime is 141523579. The reversal of 141523561 is 165325141.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9985600 + 131537961 = 3160^2 + 11469^2 .

It is a cyclic number.

It is not a de Polignac number, because 141523561 - 2¹ = 141523559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (141523541) 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, 41590 + ... + 44863.

It is an arithmetic number, because the mean of its divisors is an integer number (35402913).

Almost surely, 2^141523561 is an apocalyptic number.

It is an amenable number.

141523561 is a deficient number, since it is larger than the sum of its proper divisors (88091).

141523561 is an equidigital number, since it uses as much as digits as its factorization.

141523561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88090.

The product of its digits is 3600, while the sum is 28.

The square root of 141523561 is about 11896.3675548463. The cubic root of 141523561 is about 521.1262092576.

It can be divided in two parts, 1415 and 23561, that added together give a triangular number (24976 = T₂₂₃).

The spelling of 141523561 in words is "one hundred forty-one million, five hundred twenty-three thousand, five hundred sixty-one".