421154661 has 8 divisors (see below), whose sum is σ = 562941504. Its totient is φ = 280068800.

The previous prime is 421154647. The next prime is 421154681. The reversal of 421154661 is 166451124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421154661 - 2⁶ = 421154597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421154611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173841 + ... + 176246.

It is an arithmetic number, because the mean of its divisors is an integer number (70367688).

Almost surely, 2^421154661 is an apocalyptic number.

It is an amenable number.

421154661 is a deficient number, since it is larger than the sum of its proper divisors (141786843).

421154661 is a wasteful number, since it uses less digits than its factorization.

421154661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350491.

The product of its digits is 5760, while the sum is 30.

The square root of 421154661 is about 20522.0530405708. The cubic root of 421154661 is about 749.5728892592.

The spelling of 421154661 in words is "four hundred twenty-one million, one hundred fifty-four thousand, six hundred sixty-one".