3121420 has 12 divisors (see below), whose sum is σ = 6555024. Its totient is φ = 1248560.

The previous prime is 3121409. The next prime is 3121423. The reversal of 3121420 is 241213.

It is a self number, because there is not a number n which added to its sum of digits gives 3121420.

It is not an unprimeable number, because it can be changed into a prime (3121423) 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, 78016 + ... + 78055.

It is an arithmetic number, because the mean of its divisors is an integer number (546252).

Almost surely, 2^3121420 is an apocalyptic number.

It is an amenable number.

3121420 is an abundant number, since it is smaller than the sum of its proper divisors (3433604).

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

3121420 is a wasteful number, since it uses less digits than its factorization.

3121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156080 (or 156078 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 3121420 is about 1766.7540858875. The cubic root of 3121420 is about 146.1450363324.

Adding to 3121420 its reverse (241213), we get a palindrome (3362633).

The spelling of 3121420 in words is "three million, one hundred twenty-one thousand, four hundred twenty".