1161256037 has 4 divisors (see below), whose sum is σ = 1163013516. Its totient is φ = 1159498560.

The previous prime is 1161256021. The next prime is 1161256067. The reversal of 1161256037 is 7306521611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 871371361 + 289884676 = 29519^2 + 17026^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161256037 - 2⁴ = 1161256021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161255994 and 1161256012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161256007) 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, 877748 + ... + 879069.

It is an arithmetic number, because the mean of its divisors is an integer number (290753379).

Almost surely, 2^1161256037 is an apocalyptic number.

It is an amenable number.

1161256037 is a deficient number, since it is larger than the sum of its proper divisors (1757479).

1161256037 is an equidigital number, since it uses as much as digits as its factorization.

1161256037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757478.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1161256037 is about 34077.2070011613. The cubic root of 1161256037 is about 1051.0966733786.

Adding to 1161256037 its reverse (7306521611), we get a palindrome (8467777648).

The spelling of 1161256037 in words is "one billion, one hundred sixty-one million, two hundred fifty-six thousand, thirty-seven".