7251840 has 96 divisors (see below), whose sum is σ = 25061400. Its totient is φ = 1932288.

The previous prime is 7251833. The next prime is 7251847. The reversal of 7251840 is 481527.

It is an interprime number because it is at equal distance from previous prime (7251833) and next prime (7251847).

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7251847) 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 11 ways as a sum of consecutive naturals, for example, 5131 + ... + 6389.

Almost surely, 2^7251840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7251840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12530700).

7251840 is an abundant number, since it is smaller than the sum of its proper divisors (17809560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7251840 is a wasteful number, since it uses less digits than its factorization.

7251840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284 (or 1269 counting only the distinct ones).

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

The square root of 7251840 is about 2692.9240613133. The cubic root of 7251840 is about 193.5602040097.

The spelling of 7251840 in words is "seven million, two hundred fifty-one thousand, eight hundred forty".