43872545 has 4 divisors (see below), whose sum is σ = 52647060. Its totient is φ = 35098032.

The previous prime is 43872527. The next prime is 43872559. The reversal of 43872545 is 54527834.

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 5914624 + 37957921 = 2432^2 + 6161^2 .

It is a cyclic number.

It is not a de Polignac number, because 43872545 - 2¹⁶ = 43807009 is a prime.

It is a super-3 number, since 3×43872545³ (a number of 24 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 43872499 and 43872508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4387250 + ... + 4387259.

It is an arithmetic number, because the mean of its divisors is an integer number (13161765).

Almost surely, 2^43872545 is an apocalyptic number.

It is an amenable number.

43872545 is a deficient number, since it is larger than the sum of its proper divisors (8774515).

43872545 is an equidigital number, since it uses as much as digits as its factorization.

43872545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8774514.

The product of its digits is 134400, while the sum is 38.

The square root of 43872545 is about 6623.6353311456. The cubic root of 43872545 is about 352.6936246575.

The spelling of 43872545 in words is "forty-three million, eight hundred seventy-two thousand, five hundred forty-five".