1157388101 has 4 divisors (see below), whose sum is σ = 1225469772. Its totient is φ = 1089306432.

The previous prime is 1157388079. The next prime is 1157388109. The reversal of 1157388101 is 1018837511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1018837511 = 9221 ⋅110491.

It can be written as a sum of positive squares in 2 ways, for example, as 1070991076 + 86397025 = 32726^2 + 9295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157388101 - 2¹⁴ = 1157371717 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 (1157388109) 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, 34040810 + ... + 34040843.

It is an arithmetic number, because the mean of its divisors is an integer number (306367443).

Almost surely, 2^1157388101 is an apocalyptic number.

It is an amenable number.

1157388101 is a deficient number, since it is larger than the sum of its proper divisors (68081671).

1157388101 is an equidigital number, since it uses as much as digits as its factorization.

1157388101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68081670.

The product of its (nonzero) digits is 6720, while the sum is 35.

The square root of 1157388101 is about 34020.4071257238. The cubic root of 1157388101 is about 1049.9283703215.

The spelling of 1157388101 in words is "one billion, one hundred fifty-seven million, three hundred eighty-eight thousand, one hundred one".