7421651 has 4 divisors (see below), whose sum is σ = 7677600. Its totient is φ = 7165704.

The previous prime is 7421641. The next prime is 7421677. The reversal of 7421651 is 1561247.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7421651 - 2⁶ = 7421587 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7421651.

It is not an unprimeable number, because it can be changed into a prime (7421641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127931 + ... + 127988.

It is an arithmetic number, because the mean of its divisors is an integer number (1919400).

Almost surely, 2^7421651 is an apocalyptic number.

7421651 is a deficient number, since it is larger than the sum of its proper divisors (255949).

7421651 is a wasteful number, since it uses less digits than its factorization.

7421651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255948.

The product of its digits is 1680, while the sum is 26.

The square root of 7421651 is about 2724.2707281032. The cubic root of 7421651 is about 195.0593814332.

Adding to 7421651 its reverse (1561247), we get a palindrome (8982898).

The spelling of 7421651 in words is "seven million, four hundred twenty-one thousand, six hundred fifty-one".