7421000 has 64 divisors (see below), whose sum is σ = 17886960. Its totient is φ = 2880000.

The previous prime is 7420969. The next prime is 7421003. The reversal of 7421000 is 1247.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1359556 + 6061444 = 1166^2 + 2462^2 .

It is a nialpdrome in base 10.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (7421003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40910 + ... + 41090.

Almost surely, 2^7421000 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 7421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8943480).

7421000 is an abundant number, since it is smaller than the sum of its proper divisors (10465960).

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

7421000 is a wasteful number, since it uses less digits than its factorization.

7421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 7421000 is about 2724.1512439657. The cubic root of 7421000 is about 195.0536779686.

Adding to 7421000 its reverse (1247), we get a palindrome (7422247).

The spelling of 7421000 in words is "seven million, four hundred twenty-one thousand".