1201525013 has 16 divisors (see below), whose sum is σ = 1374762480. Its totient is φ = 1041901056.

The previous prime is 1201524971. The next prime is 1201525019. The reversal of 1201525013 is 3105251021.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 127193284 + 1074331729 = 11278^2 + 32777^2 .

It is not a de Polignac number, because 1201525013 - 2¹⁰ = 1201523989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201525019) 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, 29120 + ... + 57017.

It is an arithmetic number, because the mean of its divisors is an integer number (85922655).

Almost surely, 2^1201525013 is an apocalyptic number.

1201525013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1201525013 is a deficient number, since it is larger than the sum of its proper divisors (173237467).

1201525013 is a wasteful number, since it uses less digits than its factorization.

1201525013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86216.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1201525013 is about 34663.0208291199. The cubic root of 1201525013 is about 1063.1085364383.

Adding to 1201525013 its reverse (3105251021), we get a palindrome (4306776034).

The spelling of 1201525013 in words is "one billion, two hundred one million, five hundred twenty-five thousand, thirteen".