1129657251 has 8 divisors (see below), whose sum is σ = 1506391744. Its totient is φ = 753013800.

The previous prime is 1129657241. The next prime is 1129657301. The reversal of 1129657251 is 1527569211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1129657251 - 2⁵ = 1129657219 is a prime.

It is a super-2 number, since 2×1129657251² = 2552251009473754002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129657241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15276 + ... + 49926.

It is an arithmetic number, because the mean of its divisors is an integer number (188298968).

Almost surely, 2^1129657251 is an apocalyptic number.

1129657251 is a deficient number, since it is larger than the sum of its proper divisors (376734493).

1129657251 is a wasteful number, since it uses less digits than its factorization.

1129657251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45521.

The product of its digits is 37800, while the sum is 39.

The square root of 1129657251 is about 33610.3741573937. The cubic root of 1129657251 is about 1041.4751167301.

The spelling of 1129657251 in words is "one billion, one hundred twenty-nine million, six hundred fifty-seven thousand, two hundred fifty-one".