7280145 has 16 divisors (see below), whose sum is σ = 12942720. Its totient is φ = 3882672.

The previous prime is 7280137. The next prime is 7280149. The reversal of 7280145 is 5410827.

It is not a de Polignac number, because 7280145 - 2³ = 7280137 is a prime.

It is a super-2 number, since 2×7280145² = 106001022442050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (7280149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26829 + ... + 27098.

It is an arithmetic number, because the mean of its divisors is an integer number (808920).

Almost surely, 2^7280145 is an apocalyptic number.

It is an amenable number.

7280145 is a deficient number, since it is larger than the sum of its proper divisors (5662575).

7280145 is a wasteful number, since it uses less digits than its factorization.

7280145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53941 (or 53935 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 7280145 is about 2698.1743828003. The cubic root of 7280145 is about 193.8117084051.

The spelling of 7280145 in words is "seven million, two hundred eighty thousand, one hundred forty-five".