141405561 has 24 divisors (see below), whose sum is σ = 230270880. Its totient is φ = 85698360.

The previous prime is 141405553. The next prime is 141405613. The reversal of 141405561 is 165504141.

It is not a de Polignac number, because 141405561 - 2³ = 141405553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (141405521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18375 + ... + 24908.

It is an arithmetic number, because the mean of its divisors is an integer number (9594620).

Almost surely, 2^141405561 is an apocalyptic number.

141405561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

141405561 is a deficient number, since it is larger than the sum of its proper divisors (88865319).

141405561 is a wasteful number, since it uses less digits than its factorization.

141405561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43314 (or 43297 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 141405561 is about 11891.4070235612. The cubic root of 141405561 is about 520.9813335193.

It can be divided in two parts, 14140 and 5561, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 141405561 in words is "one hundred forty-one million, four hundred five thousand, five hundred sixty-one".