420121386 has 12 divisors (see below), whose sum is σ = 910263042. Its totient is φ = 140040456.

The previous prime is 420121379. The next prime is 420121397. The reversal of 420121386 is 683121024.

It can be written as a sum of positive squares in only one way, i.e., 266832225 + 153289161 = 16335^2 + 12381^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11670021 + ... + 11670056.

Almost surely, 2^420121386 is an apocalyptic number.

420121386 is an abundant number, since it is smaller than the sum of its proper divisors (490141656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420121386 is a wasteful number, since it uses less digits than its factorization.

420121386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23340085 (or 23340082 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 420121386 is about 20496.8628331264. The cubic root of 420121386 is about 748.9593781426.

The spelling of 420121386 in words is "four hundred twenty million, one hundred twenty-one thousand, three hundred eighty-six".