421556061 has 4 divisors (see below), whose sum is σ = 562074752. Its totient is φ = 281037372.

The previous prime is 421556041. The next prime is 421556063. The reversal of 421556061 is 160655124.

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 not a de Polignac number, because 421556061 - 2¹¹ = 421554013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421556063) 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, 70259341 + ... + 70259346.

It is an arithmetic number, because the mean of its divisors is an integer number (140518688).

Almost surely, 2^421556061 is an apocalyptic number.

It is an amenable number.

421556061 is a deficient number, since it is larger than the sum of its proper divisors (140518691).

421556061 is a wasteful number, since it uses less digits than its factorization.

421556061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140518690.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 421556061 is about 20531.8304347177. The cubic root of 421556061 is about 749.8109514626.

The spelling of 421556061 in words is "four hundred twenty-one million, five hundred fifty-six thousand, sixty-one".