7125145 has 4 divisors (see below), whose sum is σ = 8550180. Its totient is φ = 5700112.

The previous prime is 7125121. The next prime is 7125169. The reversal of 7125145 is 5415217.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (7125121) and next prime (7125169).

It can be written as a sum of positive squares in 2 ways, for example, as 1798281 + 5326864 = 1341^2 + 2308^2 .

It is a cyclic number.

It is not a de Polignac number, because 7125145 - 2⁵ = 7125113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712510 + ... + 712519.

It is an arithmetic number, because the mean of its divisors is an integer number (2137545).

Almost surely, 2^7125145 is an apocalyptic number.

It is an amenable number.

7125145 is a deficient number, since it is larger than the sum of its proper divisors (1425035).

7125145 is a wasteful number, since it uses less digits than its factorization.

7125145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425034.

The product of its digits is 1400, while the sum is 25.

The square root of 7125145 is about 2669.2967238582. The cubic root of 7125145 is about 192.4263618946.

The spelling of 7125145 in words is "seven million, one hundred twenty-five thousand, one hundred forty-five".