421942951 has 4 divisors (see below), whose sum is σ = 421994304. Its totient is φ = 421891600.

The previous prime is 421942933. The next prime is 421942973. The reversal of 421942951 is 159249124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 4-Lehmer number, since φ(421942951) divides (421942951-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 421942951 - 2¹⁷ = 421811879 is a prime.

It is a super-3 number, since 3×421942951³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421942951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421942901) 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, 10270 + ... + 30811.

It is an arithmetic number, because the mean of its divisors is an integer number (105498576).

It is a Poulet number, since it divides 2^421942950-1.

Almost surely, 2^421942951 is an apocalyptic number.

421942951 is the 10271-st decagonal number.

421942951 is a deficient number, since it is larger than the sum of its proper divisors (51353).

421942951 is a wasteful number, since it uses less digits than its factorization.

421942951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51352.

The product of its digits is 25920, while the sum is 37.

The square root of 421942951 is about 20541.2499863080. The cubic root of 421942951 is about 750.0402650975.

The spelling of 421942951 in words is "four hundred twenty-one million, nine hundred forty-two thousand, nine hundred fifty-one".