1261393698 has 16 divisors (see below), whose sum is σ = 2655565920. Its totient is φ = 398334816.

The previous prime is 1261393697. The next prime is 1261393699. The reversal of 1261393698 is 8963931621.

1261393698 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1261393697) and next prime (1261393699).

It is a super-2 number, since 2×1261393698² = 3182228122708230408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1261393697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5532315 + ... + 5532542.

It is an arithmetic number, because the mean of its divisors is an integer number (165972870).

Almost surely, 2^1261393698 is an apocalyptic number.

1261393698 is an abundant number, since it is smaller than the sum of its proper divisors (1394172222).

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

1261393698 is a wasteful number, since it uses less digits than its factorization.

1261393698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11064881.

The product of its digits is 419904, while the sum is 48.

The square root of 1261393698 is about 35516.1047695267. The cubic root of 1261393698 is about 1080.4803812891.

The spelling of 1261393698 in words is "one billion, two hundred sixty-one million, three hundred ninety-three thousand, six hundred ninety-eight".