1201235516 has 24 divisors (see below), whose sum is σ = 2302243440. Its totient is φ = 545018112.

The previous prime is 1201235473. The next prime is 1201235531. The reversal of 1201235516 is 6155321021.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192701 + ... + 198836.

It is an arithmetic number, because the mean of its divisors is an integer number (95926810).

Almost surely, 2^1201235516 is an apocalyptic number.

It is an amenable number.

1201235516 is a deficient number, since it is larger than the sum of its proper divisors (1101007924).

1201235516 is a wasteful number, since it uses less digits than its factorization.

1201235516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391613 (or 391611 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1201235516 is about 34658.8447008841. The cubic root of 1201235516 is about 1063.0231473286.

Adding to 1201235516 its reverse (6155321021), we get a palindrome (7356556537).

The spelling of 1201235516 in words is "one billion, two hundred one million, two hundred thirty-five thousand, five hundred sixteen".