421153001 has 4 divisors (see below), whose sum is σ = 425016900. Its totient is φ = 417289104.

The previous prime is 421152997. The next prime is 421153009. The reversal of 421153001 is 100351124.

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 130416400 + 290736601 = 11420^2 + 17051^2 .

It is a cyclic number.

It is not a de Polignac number, because 421153001 - 2² = 421152997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421153009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1931786 + ... + 1932003.

It is an arithmetic number, because the mean of its divisors is an integer number (106254225).

Almost surely, 2^421153001 is an apocalyptic number.

It is an amenable number.

421153001 is a deficient number, since it is larger than the sum of its proper divisors (3863899).

421153001 is a wasteful number, since it uses less digits than its factorization.

421153001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3863898.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 421153001 is about 20522.0125962343. The cubic root of 421153001 is about 749.5719044328.

The spelling of 421153001 in words is "four hundred twenty-one million, one hundred fifty-three thousand, one".