715421 has 4 divisors (see below), whose sum is σ = 817632. Its totient is φ = 613212.

The previous prime is 715417. The next prime is 715423. The reversal of 715421 is 124517.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124517 = 41 ⋅3037.

It is a cyclic number.

It is not a de Polignac number, because 715421 - 2² = 715417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 715393 and 715402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (715423) 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, 51095 + ... + 51108.

It is an arithmetic number, because the mean of its divisors is an integer number (204408).

2⁷¹⁵⁴²¹ is an apocalyptic number.

It is an amenable number.

715421 is a deficient number, since it is larger than the sum of its proper divisors (102211).

715421 is a wasteful number, since it uses less digits than its factorization.

715421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102210.

The product of its digits is 280, while the sum is 20.

The square root of 715421 is about 845.8256321488. The cubic root of 715421 is about 89.4376874503.

Adding to 715421 its reverse (124517), we get a palindrome (839938).

The spelling of 715421 in words is "seven hundred fifteen thousand, four hundred twenty-one".