41721157 has 2 divisors, whose sum is σ = 41721158. Its totient is φ = 41721156.

The previous prime is 41721107. The next prime is 41721193. The reversal of 41721157 is 75112714.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21659716 + 20061441 = 4654^2 + 4479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41721157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41721107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20860578 + 20860579.

It is an arithmetic number, because the mean of its divisors is an integer number (20860579).

Almost surely, 2^41721157 is an apocalyptic number.

It is an amenable number.

41721157 is a deficient number, since it is larger than the sum of its proper divisors (1).

41721157 is an equidigital number, since it uses as much as digits as its factorization.

41721157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1960, while the sum is 28.

The square root of 41721157 is about 6459.1916676934. The cubic root of 41721157 is about 346.8316972918.

It can be divided in two parts, 4172 and 1157, that added together give a square (5329 = 73²).

The spelling of 41721157 in words is "forty-one million, seven hundred twenty-one thousand, one hundred fifty-seven".