45120251 has 4 divisors (see below), whose sum is σ = 49222104. Its totient is φ = 41018400.

The previous prime is 45120239. The next prime is 45120263. The reversal of 45120251 is 15202154.

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

It is an interprime number because it is at equal distance from previous prime (45120239) and next prime (45120263).

It is a cyclic number.

It is not a de Polignac number, because 45120251 - 2¹⁴ = 45103867 is a prime.

It is a pancake number, because a pancake can be divided into 45120251 parts by 9499 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45120281) 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, 2050910 + ... + 2050931.

It is an arithmetic number, because the mean of its divisors is an integer number (12305526).

Almost surely, 2^45120251 is an apocalyptic number.

45120251 is a deficient number, since it is larger than the sum of its proper divisors (4101853).

45120251 is a wasteful number, since it uses less digits than its factorization.

45120251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101852.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 45120251 is about 6717.1609330133. The cubic root of 45120251 is about 356.0058782643.

It can be divided in two parts, 451 and 20251, that added together give a palindrome (20702).

The spelling of 45120251 in words is "forty-five million, one hundred twenty thousand, two hundred fifty-one".