1045052251 has 4 divisors (see below), whose sum is σ = 1064770272. Its totient is φ = 1025334232.

The previous prime is 1045052249. The next prime is 1045052257. The reversal of 1045052251 is 1522505401.

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 1045052251 - 2¹ = 1045052249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045052257) 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, 9858931 + ... + 9859036.

It is an arithmetic number, because the mean of its divisors is an integer number (266192568).

Almost surely, 2^1045052251 is an apocalyptic number.

1045052251 is a deficient number, since it is larger than the sum of its proper divisors (19718021).

1045052251 is an equidigital number, since it uses as much as digits as its factorization.

1045052251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19718020.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1045052251 is about 32327.2679173480. The cubic root of 1045052251 is about 1014.7973746802.

Adding to 1045052251 its reverse (1522505401), we get a palindrome (2567557652).

The spelling of 1045052251 in words is "one billion, forty-five million, fifty-two thousand, two hundred fifty-one".