49451257 has 2 divisors, whose sum is σ = 49451258. Its totient is φ = 49451256.

The previous prime is 49451239. The next prime is 49451261. The reversal of 49451257 is 75215494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49294441 + 156816 = 7021^2 + 396^2 .

It is a cyclic number.

It is not a de Polignac number, because 49451257 - 2²³ = 41062649 is a prime.

It is not a weakly prime, because it can be changed into another prime (49451557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24725628 + 24725629.

It is an arithmetic number, because the mean of its divisors is an integer number (24725629).

Almost surely, 2^49451257 is an apocalyptic number.

It is an amenable number.

49451257 is a deficient number, since it is larger than the sum of its proper divisors (1).

49451257 is an equidigital number, since it uses as much as digits as its factorization.

49451257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 49451257 is about 7032.1587723828. The cubic root of 49451257 is about 367.0504648881.

The spelling of 49451257 in words is "forty-nine million, four hundred fifty-one thousand, two hundred fifty-seven".