102442757 has 2 divisors, whose sum is σ = 102442758. Its totient is φ = 102442756.

The previous prime is 102442687. The next prime is 102442771. The reversal of 102442757 is 757244201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98386561 + 4056196 = 9919^2 + 2014^2 .

It is a cyclic number.

It is not a de Polignac number, because 102442757 - 2¹⁰ = 102441733 is a prime.

It is a super-2 number, since 2×102442757² = 20989036923522098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102442157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51221378 + 51221379.

It is an arithmetic number, because the mean of its divisors is an integer number (51221379).

Almost surely, 2^102442757 is an apocalyptic number.

It is an amenable number.

102442757 is a deficient number, since it is larger than the sum of its proper divisors (1).

102442757 is an equidigital number, since it uses as much as digits as its factorization.

102442757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 102442757 is about 10121.4009405813. The cubic root of 102442757 is about 467.9079447961.

Adding to 102442757 its reverse (757244201), we get a palindrome (859686958).

The spelling of 102442757 in words is "one hundred two million, four hundred forty-two thousand, seven hundred fifty-seven".