141208721 has 4 divisors (see below), whose sum is σ = 141504000. Its totient is φ = 140913444.

The previous prime is 141208709. The next prime is 141208733. The reversal of 141208721 is 127802141.

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 an emirpimes, since its reverse is a distinct semiprime: 127802141 = 17 ⋅7517773.

It is an interprime number because it is at equal distance from previous prime (141208709) and next prime (141208733).

It is a cyclic number.

It is not a de Polignac number, because 141208721 - 2¹⁸ = 140946577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (141208121) 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, 146921 + ... + 147878.

It is an arithmetic number, because the mean of its divisors is an integer number (35376000).

Almost surely, 2^141208721 is an apocalyptic number.

It is an amenable number.

141208721 is a deficient number, since it is larger than the sum of its proper divisors (295279).

141208721 is an equidigital number, since it uses as much as digits as its factorization.

141208721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295278.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 141208721 is about 11883.1275765263. The cubic root of 141208721 is about 520.7394816764.

The spelling of 141208721 in words is "one hundred forty-one million, two hundred eight thousand, seven hundred twenty-one".