2145020 has 12 divisors (see below), whose sum is σ = 4504584. Its totient is φ = 858000.

The previous prime is 2144999. The next prime is 2145023. The reversal of 2145020 is 205412.

It is a super-2 number, since 2×2145020² = 9202221600800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2144986 and 2145004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145023) 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, 53606 + ... + 53645.

It is an arithmetic number, because the mean of its divisors is an integer number (375382).

2^2145020 is an apocalyptic number.

2145020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145020 is an abundant number, since it is smaller than the sum of its proper divisors (2359564).

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

2145020 is a wasteful number, since it uses less digits than its factorization.

2145020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107260 (or 107258 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2145020 is about 1464.5886794592. The cubic root of 2145020 is about 128.9665598477.

The spelling of 2145020 in words is "two million, one hundred forty-five thousand, twenty".