1147100381 has 16 divisors (see below), whose sum is σ = 1425609216. Its totient is φ = 900377856.

The previous prime is 1147100363. The next prime is 1147100387. The reversal of 1147100381 is 1830017411.

It is not a de Polignac number, because 1147100381 - 2¹⁸ = 1146838237 is a prime.

It is a super-2 number, since 2×1147100381² = 2631678568180690322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1147100381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147100387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125861 + ... + 134666.

It is an arithmetic number, because the mean of its divisors is an integer number (89100576).

Almost surely, 2^1147100381 is an apocalyptic number.

It is an amenable number.

1147100381 is a deficient number, since it is larger than the sum of its proper divisors (278508835).

1147100381 is a wasteful number, since it uses less digits than its factorization.

1147100381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260588.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1147100381 is about 33868.8703826980. The cubic root of 1147100381 is about 1046.8082611777.

Adding to 1147100381 its reverse (1830017411), we get a palindrome (2977117792).

The spelling of 1147100381 in words is "one billion, one hundred forty-seven million, one hundred thousand, three hundred eighty-one".