1201542511 has 12 divisors (see below), whose sum is σ = 1302803352. Its totient is φ = 1107646176.

The previous prime is 1201542499. The next prime is 1201542533. The reversal of 1201542511 is 1152451021.

It is not a de Polignac number, because 1201542511 - 2¹³ = 1201534319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201542581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135465 + ... + 144061.

It is an arithmetic number, because the mean of its divisors is an integer number (108566946).

Almost surely, 2^1201542511 is an apocalyptic number.

1201542511 is a deficient number, since it is larger than the sum of its proper divisors (101260841).

1201542511 is an equidigital number, since it uses as much as digits as its factorization.

1201542511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9450 (or 9437 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1201542511 is about 34663.2732297456. The cubic root of 1201542511 is about 1063.1136971528.

Adding to 1201542511 its reverse (1152451021), we get a palindrome (2353993532).

The spelling of 1201542511 in words is "one billion, two hundred one million, five hundred forty-two thousand, five hundred eleven".