1201445541 has 40 divisors (see below), whose sum is σ = 1839451680. Its totient is φ = 781257312.

The previous prime is 1201445521. The next prime is 1201445551. The reversal of 1201445541 is 1455441021.

1201445541 is a `hidden beast` number, since 1 + 201 + 4 + 455 + 4 + 1 = 666.

It is not a de Polignac number, because 1201445541 - 2²⁶ = 1134336677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201445521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 579655 + ... + 581723.

It is an arithmetic number, because the mean of its divisors is an integer number (45986292).

Almost surely, 2^1201445541 is an apocalyptic number.

It is an amenable number.

1201445541 is a deficient number, since it is larger than the sum of its proper divisors (638006139).

1201445541 is a wasteful number, since it uses less digits than its factorization.

1201445541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255 (or 2246 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1201445541 is about 34661.8744588345. The cubic root of 1201445541 is about 1063.0850969971.

Adding to 1201445541 its reverse (1455441021), we get a palindrome (2656886562).

The spelling of 1201445541 in words is "one billion, two hundred one million, four hundred forty-five thousand, five hundred forty-one".