2151020 has 24 divisors (see below), whose sum is σ = 4557168. Its totient is φ = 852800.

The previous prime is 2151013. The next prime is 2151031. The reversal of 2151020 is 201512.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2150992 and 2151010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2210 + ... + 3030.

It is an arithmetic number, because the mean of its divisors is an integer number (189882).

2^2151020 is an apocalyptic number.

2151020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151020 is an abundant number, since it is smaller than the sum of its proper divisors (2406148).

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

2151020 is a wasteful number, since it uses less digits than its factorization.

2151020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 2151020 is about 1466.6356057317. The cubic root of 2151020 is about 129.0866953233.

Adding to 2151020 its reverse (201512), we get a palindrome (2352532).

The spelling of 2151020 in words is "two million, one hundred fifty-one thousand, twenty".