1155172407 has 8 divisors (see below), whose sum is σ = 1541078400. Its totient is φ = 769690680.

The previous prime is 1155172397. The next prime is 1155172411. The reversal of 1155172407 is 7042715511.

1155172407 is nontrivially palindromic in base 7.

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

It is not a de Polignac number, because 1155172407 - 2²⁸ = 886736951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155172477) 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, 99657 + ... + 110642.

It is an arithmetic number, because the mean of its divisors is an integer number (192634800).

Almost surely, 2^1155172407 is an apocalyptic number.

1155172407 is a deficient number, since it is larger than the sum of its proper divisors (385905993).

1155172407 is a wasteful number, since it uses less digits than its factorization.

1155172407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212133.

The product of its (nonzero) digits is 9800, while the sum is 33.

The square root of 1155172407 is about 33987.8273356800. The cubic root of 1155172407 is about 1049.2579509910.

Adding to 1155172407 its reverse (7042715511), we get a palindrome (8197887918).

The spelling of 1155172407 in words is "one billion, one hundred fifty-five million, one hundred seventy-two thousand, four hundred seven".