1261352022 has 72 divisors (see below), whose sum is σ = 2986058088. Its totient is φ = 354170880.

The previous prime is 1261352017. The next prime is 1261352023. The reversal of 1261352022 is 2202531621.

It is a junction number, because it is equal to n+sod(n) for n = 1261351983 and 1261352001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261352023) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1093398 + ... + 1094550.

It is an arithmetic number, because the mean of its divisors is an integer number (41473029).

Almost surely, 2^1261352022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261352022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1493029044).

1261352022 is an abundant number, since it is smaller than the sum of its proper divisors (1724706066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261352022 is a wasteful number, since it uses less digits than its factorization.

1261352022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 1226 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1261352022 is about 35515.5180449335. The cubic root of 1261352022 is about 1080.4684815953.

Adding to 1261352022 its reverse (2202531621), we get a palindrome (3463883643).

The spelling of 1261352022 in words is "one billion, two hundred sixty-one million, three hundred fifty-two thousand, twenty-two".