1157071540 has 12 divisors (see below), whose sum is σ = 2429850276. Its totient is φ = 462828608.

The previous prime is 1157071529. The next prime is 1157071547. The reversal of 1157071540 is 451707511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 903242916 + 253828624 = 30054^2 + 15932^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157071547) 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, 28926769 + ... + 28926808.

It is an arithmetic number, because the mean of its divisors is an integer number (202487523).

Almost surely, 2^1157071540 is an apocalyptic number.

1157071540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157071540 is an abundant number, since it is smaller than the sum of its proper divisors (1272778736).

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

1157071540 is a wasteful number, since it uses less digits than its factorization.

1157071540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57853586 (or 57853584 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 31.

The square root of 1157071540 is about 34015.7542912104. The cubic root of 1157071540 is about 1049.8326384803.

The spelling of 1157071540 in words is "one billion, one hundred fifty-seven million, seventy-one thousand, five hundred forty".