307247421 has 8 divisors (see below), whose sum is σ = 441175840. Its totient is φ = 189075312.

The previous prime is 307247419. The next prime is 307247429. The reversal of 307247421 is 124742703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 307247421 - 2¹ = 307247419 is a prime.

It is a super-2 number, since 2×307247421² = 188801955422302482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307247429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3939031 + ... + 3939108.

It is an arithmetic number, because the mean of its divisors is an integer number (55146980).

Almost surely, 2^307247421 is an apocalyptic number.

It is an amenable number.

307247421 is a deficient number, since it is larger than the sum of its proper divisors (133928419).

307247421 is a wasteful number, since it uses less digits than its factorization.

307247421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7878155.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 307247421 is about 17528.4745770988. The cubic root of 307247421 is about 674.7808495700.

The spelling of 307247421 in words is "three hundred seven million, two hundred forty-seven thousand, four hundred twenty-one".