45071251 has 4 divisors (see below), whose sum is σ = 45155104. Its totient is φ = 44987400.

The previous prime is 45071239. The next prime is 45071281. The reversal of 45071251 is 15217054.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45071251 - 2¹⁷ = 44940179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45071231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41115 + ... + 42196.

It is an arithmetic number, because the mean of its divisors is an integer number (11288776).

Almost surely, 2^45071251 is an apocalyptic number.

45071251 is a deficient number, since it is larger than the sum of its proper divisors (83853).

45071251 is an equidigital number, since it uses as much as digits as its factorization.

45071251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83852.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 45071251 is about 6713.5125679483. The cubic root of 45071251 is about 355.8769590154.

The spelling of 45071251 in words is "forty-five million, seventy-one thousand, two hundred fifty-one".