7256145 has 32 divisors (see below), whose sum is σ = 12644352. Its totient is φ = 3532032.

The previous prime is 7256141. The next prime is 7256147. The reversal of 7256145 is 5416527.

7256145 is a nontrivial binomial coefficient, being equal to C(3810, 2).

It is not a de Polignac number, because 7256145 - 2² = 7256141 is a prime.

It is a super-2 number, since 2×7256145² = 105303280522050, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7256141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24619 + ... + 24911.

It is an arithmetic number, because the mean of its divisors is an integer number (395136).

Almost surely, 2^7256145 is an apocalyptic number.

7256145 is the 3809-th triangular number and also the 1905-th hexagonal number.

It is an amenable number.

7256145 is a deficient number, since it is larger than the sum of its proper divisors (5388207).

7256145 is a wasteful number, since it uses less digits than its factorization.

7256145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its digits is 8400, while the sum is 30.

The square root of 7256145 is about 2693.7232597281. The cubic root of 7256145 is about 193.5984982837.

The spelling of 7256145 in words is "seven million, two hundred fifty-six thousand, one hundred forty-five".