1153261395 has 80 divisors (see below), whose sum is σ = 2428870752. Its totient is φ = 516119040.

The previous prime is 1153261387. The next prime is 1153261409. The reversal of 1153261395 is 5931623511.

It is a happy number.

1153261395 is a `hidden beast` number, since 1 + 1 + 5 + 3 + 261 + 395 = 666.

It is not a de Polignac number, because 1153261395 - 2³ = 1153261387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 47959 + ... + 67871.

Almost surely, 2^1153261395 is an apocalyptic number.

1153261395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1153261395 is an abundant number, since it is smaller than the sum of its proper divisors (1275609357).

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

1153261395 is a wasteful number, since it uses less digits than its factorization.

1153261395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19954 (or 19945 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 1153261395 is about 33959.7025163649. The cubic root of 1153261395 is about 1048.6790327130.

It can be divided in two parts, 11532 and 61395, that added together give a palindrome (72927).

The spelling of 1153261395 in words is "one billion, one hundred fifty-three million, two hundred sixty-one thousand, three hundred ninety-five".