420161851 has 8 divisors (see below), whose sum is σ = 445846464. Its totient is φ = 394584960.

The previous prime is 420161849. The next prime is 420161869. The reversal of 420161851 is 158161024.

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

It is not a de Polignac number, because 420161851 - 2¹ = 420161849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420161821) 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, 18820 + ... + 34561.

It is an arithmetic number, because the mean of its divisors is an integer number (55730808).

Almost surely, 2^420161851 is an apocalyptic number.

420161851 is a deficient number, since it is larger than the sum of its proper divisors (25684613).

420161851 is a wasteful number, since it uses less digits than its factorization.

420161851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53861.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 420161851 is about 20497.8499116371. The cubic root of 420161851 is about 748.9834233109.

The spelling of 420161851 in words is "four hundred twenty million, one hundred sixty-one thousand, eight hundred fifty-one".