7251090 has 128 divisors (see below), whose sum is σ = 22505472. Its totient is φ = 1451520.

The previous prime is 7251071. The next prime is 7251091. The reversal of 7251090 is 901527.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7251090.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7251091) 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 63 ways as a sum of consecutive naturals, for example, 99294 + ... + 99366.

It is an arithmetic number, because the mean of its divisors is an integer number (175824).

Almost surely, 2^7251090 is an apocalyptic number.

7251090 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7251090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11252736).

7251090 is an abundant number, since it is smaller than the sum of its proper divisors (15254382).

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

7251090 is a wasteful number, since it uses less digits than its factorization.

7251090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 7251090 is about 2692.7848038787. The cubic root of 7251090 is about 193.5535309834.

The spelling of 7251090 in words is "seven million, two hundred fifty-one thousand, ninety".