157261 has 4 divisors (see below), whose sum is σ = 169372. Its totient is φ = 145152.

The previous prime is 157259. The next prime is 157271. The reversal of 157261 is 162751.

157261 = T₁₄₉ + T₁₅₀ + ... + T₁₆₁.

157261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12100 + 145161 = 110^2 + 381^2 .

It is a cyclic number.

It is not a de Polignac number, because 157261 - 2¹ = 157259 is a prime.

It is a Duffinian number.

157261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157211) 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, 6036 + ... + 6061.

It is an arithmetic number, because the mean of its divisors is an integer number (42343).

2¹⁵⁷²⁶¹ is an apocalyptic number.

It is an amenable number.

157261 is a deficient number, since it is larger than the sum of its proper divisors (12111).

157261 is a wasteful number, since it uses less digits than its factorization.

157261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12110.

The product of its digits is 420, while the sum is 22.

The square root of 157261 is about 396.5614706448. The cubic root of 157261 is about 53.9767847168.

The spelling of 157261 in words is "one hundred fifty-seven thousand, two hundred sixty-one".