102040257 has 16 divisors (see below), whose sum is σ = 148635648. Its totient is φ = 61753680.

The previous prime is 102040231. The next prime is 102040261. The reversal of 102040257 is 752040201.

It is a de Polignac number, because none of the positive numbers 2^k-102040257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102040157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26688 + ... + 30270.

It is an arithmetic number, because the mean of its divisors is an integer number (9289728).

Almost surely, 2^102040257 is an apocalyptic number.

It is an amenable number.

102040257 is a deficient number, since it is larger than the sum of its proper divisors (46595391).

102040257 is a wasteful number, since it uses less digits than its factorization.

102040257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 102040257 is about 10101.4977602334. The cubic root of 102040257 is about 467.2943333576.

Adding to 102040257 its reverse (752040201), we get a palindrome (854080458).

The spelling of 102040257 in words is "one hundred two million, forty thousand, two hundred fifty-seven".