307421 has 4 divisors (see below), whose sum is σ = 309372. Its totient is φ = 305472.

The previous prime is 307409. The next prime is 307423. The reversal of 307421 is 124703.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 225625 + 81796 = 475^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 307421 - 2¹⁴ = 291037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 307421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307423) 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, 716 + ... + 1061.

It is an arithmetic number, because the mean of its divisors is an integer number (77343).

2³⁰⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

307421 is a deficient number, since it is larger than the sum of its proper divisors (1951).

307421 is a wasteful number, since it uses less digits than its factorization.

307421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 307421 is about 554.4555888437. The cubic root of 307421 is about 67.4907897813.

The spelling of 307421 in words is "three hundred seven thousand, four hundred twenty-one", and thus it is an iban number.