1129720115 has 8 divisors (see below), whose sum is σ = 1362763008. Its totient is φ = 899043520.

The previous prime is 1129720093. The next prime is 1129720133. The reversal of 1129720115 is 5110279211.

It is a happy number.

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

It is not a de Polignac number, because 1129720115 - 2⁶ = 1129720051 is a prime.

It is a super-2 number, since 2×1129720115² = 2552535076471226450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590522 + ... + 592431.

It is an arithmetic number, because the mean of its divisors is an integer number (170345376).

Almost surely, 2^1129720115 is an apocalyptic number.

1129720115 is a deficient number, since it is larger than the sum of its proper divisors (233042893).

1129720115 is a wasteful number, since it uses less digits than its factorization.

1129720115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183149.

The product of its (nonzero) digits is 1260, while the sum is 29.

The square root of 1129720115 is about 33611.3093318306. The cubic root of 1129720115 is about 1041.4944352969.

Adding to 1129720115 its reverse (5110279211), we get a palindrome (6239999326).

The spelling of 1129720115 in words is "one billion, one hundred twenty-nine million, seven hundred twenty thousand, one hundred fifteen".