161126537 has 8 divisors (see below), whose sum is σ = 189295680. Its totient is φ = 135210960.

The previous prime is 161126533. The next prime is 161126543. The reversal of 161126537 is 735621161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161126537 - 2² = 161126533 is a prime.

It is a super-2 number, since 2×161126537² = 51923521851224738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161126531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563237 + ... + 563522.

It is an arithmetic number, because the mean of its divisors is an integer number (23661960).

Almost surely, 2^161126537 is an apocalyptic number.

It is an amenable number.

161126537 is a deficient number, since it is larger than the sum of its proper divisors (28169143).

161126537 is a wasteful number, since it uses less digits than its factorization.

161126537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126783.

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

The square root of 161126537 is about 12693.5628174284. The cubic root of 161126537 is about 544.1546662749.

Adding to 161126537 its reverse (735621161), we get a palindrome (896747698).

The spelling of 161126537 in words is "one hundred sixty-one million, one hundred twenty-six thousand, five hundred thirty-seven".