7145740 has 48 divisors (see below), whose sum is σ = 17563392. Its totient is φ = 2390976.

The previous prime is 7145737. The next prime is 7145759. The reversal of 7145740 is 475417.

7145740 = T₆ + T₇ + ... + T₃₄₉.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 7145699 and 7145708.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5427 + ... + 6613.

It is an arithmetic number, because the mean of its divisors is an integer number (365904).

Almost surely, 2^7145740 is an apocalyptic number.

7145740 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 7145740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8781696).

7145740 is an abundant number, since it is smaller than the sum of its proper divisors (10417652).

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

7145740 is a wasteful number, since it uses less digits than its factorization.

7145740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 7145740 is about 2673.1516979027. The cubic root of 7145740 is about 192.6115842638.

The spelling of 7145740 in words is "seven million, one hundred forty-five thousand, seven hundred forty".