427802121 has 16 divisors (see below), whose sum is σ = 634233600. Its totient is φ = 284997744.

The previous prime is 427802117. The next prime is 427802149. The reversal of 427802121 is 121208724.

It is not a de Polignac number, because 427802121 - 2² = 427802117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (427802321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39360 + ... + 49038.

It is an arithmetic number, because the mean of its divisors is an integer number (39639600).

Almost surely, 2^427802121 is an apocalyptic number.

It is an amenable number.

427802121 is a deficient number, since it is larger than the sum of its proper divisors (206431479).

427802121 is a wasteful number, since it uses less digits than its factorization.

427802121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11325 (or 11319 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 427802121 is about 20683.3778914374. The cubic root of 427802121 is about 753.4960462263.

The spelling of 427802121 in words is "four hundred twenty-seven million, eight hundred two thousand, one hundred twenty-one".