7421240 has 16 divisors (see below), whose sum is σ = 16697880. Its totient is φ = 2968480.

The previous prime is 7421237. The next prime is 7421251. The reversal of 7421240 is 421247.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92726 + ... + 92805.

Almost surely, 2^7421240 is an apocalyptic number.

It is an amenable number.

7421240 is an abundant number, since it is smaller than the sum of its proper divisors (9276640).

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

7421240 is a wasteful number, since it uses less digits than its factorization.

7421240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185542 (or 185538 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 7421240 is about 2724.1952940272. The cubic root of 7421240 is about 195.0557806672.

Adding to 7421240 its reverse (421247), we get a palindrome (7842487).

The spelling of 7421240 in words is "seven million, four hundred twenty-one thousand, two hundred forty".