3145520 has 80 divisors (see below), whose sum is σ = 8624448. Its totient is φ = 1044480.

The previous prime is 3145511. The next prime is 3145529. The reversal of 3145520 is 255413.

It is an interprime number because it is at equal distance from previous prime (3145511) and next prime (3145529).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3145492 and 3145501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3145529) 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, 22892 + ... + 23028.

Almost surely, 2^3145520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3145520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4312224).

3145520 is an abundant number, since it is smaller than the sum of its proper divisors (5478928).

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

3145520 is a wasteful number, since it uses less digits than its factorization.

3145520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 3145520 is about 1773.5613888445. The cubic root of 3145520 is about 146.5201935301.

The spelling of 3145520 in words is "three million, one hundred forty-five thousand, five hundred twenty".