7142740 has 24 divisors (see below), whose sum is σ = 16363872. Its totient is φ = 2597280.

The previous prime is 7142713. The next prime is 7142743. The reversal of 7142740 is 472417.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7142743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16014 + ... + 16453.

It is an arithmetic number, because the mean of its divisors is an integer number (681828).

Almost surely, 2^7142740 is an apocalyptic number.

It is an amenable number.

7142740 is an abundant number, since it is smaller than the sum of its proper divisors (9221132).

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

7142740 is a wasteful number, since it uses less digits than its factorization.

7142740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32487 (or 32485 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 7142740 is about 2672.5905036126. The cubic root of 7142740 is about 192.5846257480.

The spelling of 7142740 in words is "seven million, one hundred forty-two thousand, seven hundred forty".