1121563251 has 6 divisors (see below), whose sum is σ = 1620035820. Its totient is φ = 747708828.

The previous prime is 1121563231. The next prime is 1121563271. The reversal of 1121563251 is 1523651211.

1121563251 is a `hidden beast` number, since 1 + 1 + 21 + 5 + 632 + 5 + 1 = 666.

1121563251 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1121563231) and next prime (1121563271).

It is not a de Polignac number, because 1121563251 - 2⁷ = 1121563123 is a prime.

It is a super-3 number, since 3×1121563251³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121563211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62309061 + ... + 62309078.

It is an arithmetic number, because the mean of its divisors is an integer number (270005970).

Almost surely, 2^1121563251 is an apocalyptic number.

1121563251 is a deficient number, since it is larger than the sum of its proper divisors (498472569).

1121563251 is a wasteful number, since it uses less digits than its factorization.

1121563251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124618145 (or 124618142 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1121563251 is about 33489.7484463530. The cubic root of 1121563251 is about 1038.9817607263.

The spelling of 1121563251 in words is "one billion, one hundred twenty-one million, five hundred sixty-three thousand, two hundred fifty-one".