1155730172 has 6 divisors (see below), whose sum is σ = 2022527808. Its totient is φ = 577865084.

The previous prime is 1155730117. The next prime is 1155730183. The reversal of 1155730172 is 2710375511.

It is a super-2 number, since 2×1155730172² = 2671424460942299168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144466268 + ... + 144466275.

It is an arithmetic number, because the mean of its divisors is an integer number (337087968).

Almost surely, 2^1155730172 is an apocalyptic number.

It is an amenable number.

1155730172 is a deficient number, since it is larger than the sum of its proper divisors (866797636).

1155730172 is a wasteful number, since it uses less digits than its factorization.

1155730172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288932547 (or 288932545 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 1155730172 is about 33996.0317095981. The cubic root of 1155730172 is about 1049.4267988589.

The spelling of 1155730172 in words is "one billion, one hundred fifty-five million, seven hundred thirty thousand, one hundred seventy-two".