1172273520 has 80 divisors (see below), whose sum is σ = 3964424832. Its totient is φ = 284186880.

The previous prime is 1172273513. The next prime is 1172273521. The reversal of 1172273520 is 253722711.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172273521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219382 + ... + 224661.

Almost surely, 2^1172273520 is an apocalyptic number.

1172273520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1172273520 is an abundant number, since it is smaller than the sum of its proper divisors (2792151312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1172273520 is a wasteful number, since it uses less digits than its factorization.

1172273520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444070 (or 444064 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 1172273520 is about 34238.4801064533. The cubic root of 1172273520 is about 1054.4103291173.

The spelling of 1172273520 in words is "one billion, one hundred seventy-two million, two hundred seventy-three thousand, five hundred twenty".