1202261551 has 4 divisors (see below), whose sum is σ = 1227841632.
Its totient is φ = 1176681472.
The previous prime is 1202261527. The next prime is 1202261611. The reversal of 1202261551 is 1551622021.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1551622021 = 23 ⋅67461827.
It is not a de Polignac number, because 1202261551 - 25 = 1202261519 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 (1202264551) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12789970 + ... + 12790063.
It is an arithmetic number, because the mean of its divisors is an integer number (306960408).
Almost surely, 21202261551 is an apocalyptic number.
1202261551 is a deficient number, since it is larger than the sum of its proper divisors (25580081).
1202261551 is an equidigital number, since it uses as much as digits as its factorization.
1202261551 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 25580080.
The product of its (nonzero) digits is 1200, while the sum is 25.
The square root of 1202261551 is about 34673.6434630109.
The cubic root of 1202261551 is about 1063.3257215110.
Adding to 1202261551 its reverse (1551622021), we get a palindrome (2753883572).
The spelling of 1202261551 in words is "one billion, two hundred two million, two hundred sixty-one thousand, five hundred fifty-one".