1201123549 has 16 divisors (see below), whose sum is σ = 1272337920. Its totient is φ = 1131609600.

The previous prime is 1201123529. The next prime is 1201123579. The reversal of 1201123549 is 9453211021.

It is a cyclic number.

It is not a de Polignac number, because 1201123549 - 2¹¹ = 1201121501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201123519) 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, 509724 + ... + 512074.

It is an arithmetic number, because the mean of its divisors is an integer number (79521120).

Almost surely, 2^1201123549 is an apocalyptic number.

It is an amenable number.

1201123549 is a deficient number, since it is larger than the sum of its proper divisors (71214371).

1201123549 is a wasteful number, since it uses less digits than its factorization.

1201123549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1201123549 is about 34657.2293901287. The cubic root of 1201123549 is about 1062.9901182211.

It can be divided in two parts, 1201 and 123549, that added together give a triangular number (124750 = T₄₉₉).

The spelling of 1201123549 in words is "one billion, two hundred one million, one hundred twenty-three thousand, five hundred forty-nine".