1202135553 has 16 divisors (see below), whose sum is σ = 1785916800. Its totient is φ = 799184880.

The previous prime is 1202135533. The next prime is 1202135581. The reversal of 1202135553 is 3555312021.

It is a happy number.

It is not a de Polignac number, because 1202135553 - 2⁶ = 1202135489 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1202135533) 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, 52318 + ... + 71703.

It is an arithmetic number, because the mean of its divisors is an integer number (111619800).

Almost surely, 2^1202135553 is an apocalyptic number.

It is an amenable number.

1202135553 is a deficient number, since it is larger than the sum of its proper divisors (583781247).

1202135553 is a wasteful number, since it uses less digits than its factorization.

1202135553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124389 (or 124383 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1202135553 is about 34671.8265022193. The cubic root of 1202135553 is about 1063.2885744097.

Adding to 1202135553 its reverse (3555312021), we get a palindrome (4757447574).

It can be divided in two parts, 12021 and 35553, that added together give a palindrome (47574).

The spelling of 1202135553 in words is "one billion, two hundred two million, one hundred thirty-five thousand, five hundred fifty-three".