7351421 has 24 divisors (see below), whose sum is σ = 9751104. Its totient is φ = 5470080.

The previous prime is 7351403. The next prime is 7351427. The reversal of 7351421 is 1241537.

7351421 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7351421 - 2²² = 3157117 is a prime.

It is a super-3 number, since 3×7351421³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

7351421 is strictly pandigital in base 8.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7351427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12101 + ... + 12693.

It is an arithmetic number, because the mean of its divisors is an integer number (406296).

Almost surely, 2^7351421 is an apocalyptic number.

It is an amenable number.

7351421 is a deficient number, since it is larger than the sum of its proper divisors (2399683).

7351421 is a wasteful number, since it uses less digits than its factorization.

7351421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 634 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 7351421 is about 2711.3504015527. The cubic root of 7351421 is about 194.4421576027.

Adding to 7351421 its reverse (1241537), we get a palindrome (8592958).

The spelling of 7351421 in words is "seven million, three hundred fifty-one thousand, four hundred twenty-one".