45170421 has 4 divisors (see below), whose sum is σ = 60227232. Its totient is φ = 30113612.

The previous prime is 45170417. The next prime is 45170423. The reversal of 45170421 is 12407154.

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 a cyclic number.

It is not a de Polignac number, because 45170421 - 2² = 45170417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 45170391 and 45170400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45170423) 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, 7528401 + ... + 7528406.

It is an arithmetic number, because the mean of its divisors is an integer number (15056808).

Almost surely, 2^45170421 is an apocalyptic number.

It is an amenable number.

45170421 is a deficient number, since it is larger than the sum of its proper divisors (15056811).

45170421 is a wasteful number, since it uses less digits than its factorization.

45170421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15056810.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 45170421 is about 6720.8943601280. The cubic root of 45170421 is about 356.1377791195.

Adding to 45170421 its reverse (12407154), we get a palindrome (57577575).

It can be divided in two parts, 451704 and 21, that added together give a triangular number (451725 = T₉₅₀).

The spelling of 45170421 in words is "forty-five million, one hundred seventy thousand, four hundred twenty-one".