7401257 has 4 divisors (see below), whose sum is σ = 7420116. Its totient is φ = 7382400.

The previous prime is 7401227. The next prime is 7401263. The reversal of 7401257 is 7521047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7521047 = 229 ⋅32843.

It can be written as a sum of positive squares in 2 ways, for example, as 6677056 + 724201 = 2584^2 + 851^2 .

It is a cyclic number.

It is not a de Polignac number, because 7401257 - 2²⁰ = 6352681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7401227) 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 3 ways as a sum of consecutive naturals, for example, 8828 + ... + 9629.

It is an arithmetic number, because the mean of its divisors is an integer number (1855029).

Almost surely, 2^7401257 is an apocalyptic number.

It is an amenable number.

7401257 is a deficient number, since it is larger than the sum of its proper divisors (18859).

7401257 is a wasteful number, since it uses less digits than its factorization.

7401257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18858.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 7401257 is about 2720.5251331315. The cubic root of 7401257 is about 194.8805492408.

The spelling of 7401257 in words is "seven million, four hundred one thousand, two hundred fifty-seven".