7145457 has 32 divisors (see below), whose sum is σ = 11280384. Its totient is φ = 3974400.

The previous prime is 7145443. The next prime is 7145473. The reversal of 7145457 is 7545417.

It is not a de Polignac number, because 7145457 - 2⁶ = 7145393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7145417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26232 + ... + 26502.

It is an arithmetic number, because the mean of its divisors is an integer number (352512).

Almost surely, 2^7145457 is an apocalyptic number.

It is an amenable number.

7145457 is a deficient number, since it is larger than the sum of its proper divisors (4134927).

7145457 is a wasteful number, since it uses less digits than its factorization.

7145457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its digits is 19600, while the sum is 33.

The square root of 7145457 is about 2673.0987636075. The cubic root of 7145457 is about 192.6090414995.

The spelling of 7145457 in words is "seven million, one hundred forty-five thousand, four hundred fifty-seven".