43970421 has 16 divisors (see below), whose sum is σ = 64074240. Its totient is φ = 26599920.

The previous prime is 43970419. The next prime is 43970429. The reversal of 43970421 is 12407934.

It is a happy number.

It is not a de Polignac number, because 43970421 - 2¹ = 43970419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43970429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26350 + ... + 27968.

It is an arithmetic number, because the mean of its divisors is an integer number (4004640).

Almost surely, 2^43970421 is an apocalyptic number.

It is an amenable number.

43970421 is a deficient number, since it is larger than the sum of its proper divisors (20103819).

43970421 is a wasteful number, since it uses less digits than its factorization.

43970421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456.

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

The square root of 43970421 is about 6631.0196048572. The cubic root of 43970421 is about 352.9557065766.

The spelling of 43970421 in words is "forty-three million, nine hundred seventy thousand, four hundred twenty-one".