45195421 has 2 divisors, whose sum is σ = 45195422. Its totient is φ = 45195420.

The previous prime is 45195419. The next prime is 45195457. The reversal of 45195421 is 12459154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38875225 + 6320196 = 6235^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 45195421 - 2¹ = 45195419 is a prime.

Together with 45195419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45195481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22597710 + 22597711.

It is an arithmetic number, because the mean of its divisors is an integer number (22597711).

Almost surely, 2^45195421 is an apocalyptic number.

It is an amenable number.

45195421 is a deficient number, since it is larger than the sum of its proper divisors (1).

45195421 is an equidigital number, since it uses as much as digits as its factorization.

45195421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 45195421 is about 6722.7539743769. The cubic root of 45195421 is about 356.2034696179.

The spelling of 45195421 in words is "forty-five million, one hundred ninety-five thousand, four hundred twenty-one".