281124157 has 2 divisors, whose sum is σ = 281124158. Its totient is φ = 281124156.

The previous prime is 281124149. The next prime is 281124163. The reversal of 281124157 is 751421182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252619236 + 28504921 = 15894^2 + 5339^2 .

It is a cyclic number.

It is not a de Polignac number, because 281124157 - 2³ = 281124149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281124127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140562078 + 140562079.

It is an arithmetic number, because the mean of its divisors is an integer number (140562079).

Almost surely, 2^281124157 is an apocalyptic number.

It is an amenable number.

281124157 is a deficient number, since it is larger than the sum of its proper divisors (1).

281124157 is an equidigital number, since it uses as much as digits as its factorization.

281124157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 31.

The square root of 281124157 is about 16766.7574980972. The cubic root of 281124157 is about 655.0876148750.

The spelling of 281124157 in words is "two hundred eighty-one million, one hundred twenty-four thousand, one hundred fifty-seven".