11920745 has 8 divisors (see below), whose sum is σ = 14401800. Its totient is φ = 9472000.

The previous prime is 11920721. The next prime is 11920747. The reversal of 11920745 is 54702911.

It can be written as a sum of positive squares in 4 ways, for example, as 1024144 + 10896601 = 1012^2 + 3301^2 .

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

It is not a de Polignac number, because 11920745 - 2¹⁸ = 11658601 is a prime.

It is a super-2 number, since 2×11920745² = 284208322710050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11920747) 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, 7256 + ... + 8745.

It is an arithmetic number, because the mean of its divisors is an integer number (1800225).

Almost surely, 2^11920745 is an apocalyptic number.

It is an amenable number.

11920745 is a deficient number, since it is larger than the sum of its proper divisors (2481055).

11920745 is a wasteful number, since it uses less digits than its factorization.

11920745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16155.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 11920745 is about 3452.6431903688. The cubic root of 11920745 is about 228.4377107578.

It can be divided in two parts, 11920 and 745, that multiplied together give a square (8880400 = 2980²).

The spelling of 11920745 in words is "eleven million, nine hundred twenty thousand, seven hundred forty-five".