421155461 has 4 divisors (see below), whose sum is σ = 439466592. Its totient is φ = 402844332.

The previous prime is 421155443. The next prime is 421155541. The reversal of 421155461 is 164551124.

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 421155461 - 2¹⁴ = 421139077 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 (421155421) 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, 9155531 + ... + 9155576.

It is an arithmetic number, because the mean of its divisors is an integer number (109866648).

Almost surely, 2^421155461 is an apocalyptic number.

It is an amenable number.

421155461 is a deficient number, since it is larger than the sum of its proper divisors (18311131).

421155461 is a wasteful number, since it uses less digits than its factorization.

421155461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18311130.

The product of its digits is 4800, while the sum is 29.

The square root of 421155461 is about 20522.0725317888. The cubic root of 421155461 is about 749.5733638734.

The spelling of 421155461 in words is "four hundred twenty-one million, one hundred fifty-five thousand, four hundred sixty-one".