7145040 has 80 divisors (see below), whose sum is σ = 25319808. Its totient is φ = 1632768.

The previous prime is 7145011. The next prime is 7145041. The reversal of 7145040 is 405417.

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 (21).

It is a junction number, because it is equal to n+sod(n) for n = 7144998 and 7145016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7145041) 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, 447 + ... + 3806.

Almost surely, 2^7145040 is an apocalyptic number.

7145040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7145040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12659904).

7145040 is an abundant number, since it is smaller than the sum of its proper divisors (18174768).

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

7145040 is a wasteful number, since it uses less digits than its factorization.

7145040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276 (or 4270 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 7145040 is about 2673.0207631068. The cubic root of 7145040 is about 192.6052946185.

The spelling of 7145040 in words is "seven million, one hundred forty-five thousand, forty".