1201013531 has 8 divisors (see below), whose sum is σ = 1205624784. Its totient is φ = 1196411040.

The previous prime is 1201013509. The next prime is 1201013543. The reversal of 1201013531 is 1353101021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201013531 is a prime.

It is a super-2 number, since 2×1201013531² = 2884867003290175922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201013581) 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, 403856 + ... + 406818.

It is an arithmetic number, because the mean of its divisors is an integer number (150703098).

Almost surely, 2^1201013531 is an apocalyptic number.

1201013531 is a deficient number, since it is larger than the sum of its proper divisors (4611253).

1201013531 is a wasteful number, since it uses less digits than its factorization.

1201013531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1201013531 is about 34655.6421236139. The cubic root of 1201013531 is about 1062.9576620491.

Adding to 1201013531 its reverse (1353101021), we get a palindrome (2554114552).

The spelling of 1201013531 in words is "one billion, two hundred one million, thirteen thousand, five hundred thirty-one".