1172673645 has 64 divisors (see below), whose sum is σ = 2215600128. Its totient is φ = 522144000.

The previous prime is 1172673631. The next prime is 1172673647. The reversal of 1172673645 is 5463762711.

It is a happy number.

It is not a de Polignac number, because 1172673645 - 2⁴ = 1172673629 is a prime.

It is a super-3 number, since 3×1172673645³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1172673597 and 1172673606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172673647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 451300 + ... + 453890.

It is an arithmetic number, because the mean of its divisors is an integer number (34618752).

Almost surely, 2^1172673645 is an apocalyptic number.

1172673645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1172673645 is a deficient number, since it is larger than the sum of its proper divisors (1042926483).

1172673645 is a wasteful number, since it uses less digits than its factorization.

1172673645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834.

The product of its digits is 211680, while the sum is 42.

The square root of 1172673645 is about 34244.3228141542. The cubic root of 1172673645 is about 1054.5302806286.

It can be divided in two parts, 117 and 2673645, that added together give a palindrome (2673762).

The spelling of 1172673645 in words is "one billion, one hundred seventy-two million, six hundred seventy-three thousand, six hundred forty-five".