141021661 has 4 divisors (see below), whose sum is σ = 153841824. Its totient is φ = 128201500.

The previous prime is 141021659. The next prime is 141021677. The reversal of 141021661 is 166120141.

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.

It is a cyclic number.

It is not a de Polignac number, because 141021661 - 2¹ = 141021659 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141021611) 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, 6410065 + ... + 6410086.

It is an arithmetic number, because the mean of its divisors is an integer number (38460456).

Almost surely, 2^141021661 is an apocalyptic number.

141021661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

141021661 is a deficient number, since it is larger than the sum of its proper divisors (12820163).

141021661 is a wasteful number, since it uses less digits than its factorization.

141021661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12820162.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 141021661 is about 11875.2541446489. The cubic root of 141021661 is about 520.5094378769.

The spelling of 141021661 in words is "one hundred forty-one million, twenty-one thousand, six hundred sixty-one".