1202135551 has 4 divisors (see below), whose sum is σ = 1202286600. Its totient is φ = 1201984504.

The previous prime is 1202135533. The next prime is 1202135581. The reversal of 1202135551 is 1555312021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202135551 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 (1202135531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62881 + ... + 79738.

It is an arithmetic number, because the mean of its divisors is an integer number (300571650).

Almost surely, 2^1202135551 is an apocalyptic number.

1202135551 is a deficient number, since it is larger than the sum of its proper divisors (151049).

1202135551 is an equidigital number, since it uses as much as digits as its factorization.

1202135551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151048.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1202135551 is about 34671.8264733775. The cubic root of 1202135551 is about 1063.2885738200.

Adding to 1202135551 its reverse (1555312021), we get a palindrome (2757447572).

The spelling of 1202135551 in words is "one billion, two hundred two million, one hundred thirty-five thousand, five hundred fifty-one".