7142520 has 128 divisors (see below), whose sum is σ = 26749440. Its totient is φ = 1482240.

The previous prime is 7142519. The next prime is 7142521. The reversal of 7142520 is 252417.

It is an interprime number because it is at equal distance from previous prime (7142519) and next prime (7142521).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7142521) 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, 8854 + ... + 9626.

It is an arithmetic number, because the mean of its divisors is an integer number (208980).

Almost surely, 2^7142520 is an apocalyptic number.

7142520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7142520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13374720).

7142520 is an abundant number, since it is smaller than the sum of its proper divisors (19606920).

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

7142520 is a wasteful number, since it uses less digits than its factorization.

7142520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 7142520 is about 2672.5493447269. The cubic root of 7142520 is about 192.5826484931.

Adding to 7142520 its reverse (252417), we get a palindrome (7394937).

The spelling of 7142520 in words is "seven million, one hundred forty-two thousand, five hundred twenty".