357421 has 2 divisors, whose sum is σ = 357422. Its totient is φ = 357420.

The previous prime is 357389. The next prime is 357431. The reversal of 357421 is 124753.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275625 + 81796 = 525^2 + 286^2 .

It is an emirp because it is prime and its reverse (124753) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 357421 - 2⁵ = 357389 is a prime.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 357392 and 357401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (357431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178710 + 178711.

It is an arithmetic number, because the mean of its divisors is an integer number (178711).

2³⁵⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

357421 is a deficient number, since it is larger than the sum of its proper divisors (1).

357421 is an equidigital number, since it uses as much as digits as its factorization.

357421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 22.

The square root of 357421 is about 597.8469703862. The cubic root of 357421 is about 70.9675842239.

The spelling of 357421 in words is "three hundred fifty-seven thousand, four hundred twenty-one".