39407421 has 4 divisors (see below), whose sum is σ = 52543232. Its totient is φ = 26271612.

The previous prime is 39407413. The next prime is 39407429. The reversal of 39407421 is 12470493.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (39407413) and next prime (39407429).

It is not a de Polignac number, because 39407421 - 2³ = 39407413 is a prime.

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 (39407429) 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, 6567901 + ... + 6567906.

It is an arithmetic number, because the mean of its divisors is an integer number (13135808).

Almost surely, 2^39407421 is an apocalyptic number.

It is an amenable number.

39407421 is a deficient number, since it is larger than the sum of its proper divisors (13135811).

39407421 is a wasteful number, since it uses less digits than its factorization.

39407421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13135810.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 39407421 is about 6277.5330345606. The cubic root of 39407421 is about 340.2979539258.

The spelling of 39407421 in words is "thirty-nine million, four hundred seven thousand, four hundred twenty-one".