102442725 has 168 divisors, whose sum is σ = 240704832. Its totient is φ = 41990400.

The previous prime is 102442687. The next prime is 102442757. The reversal of 102442725 is 527244201.

It is not a de Polignac number, because 102442725 - 2⁷ = 102442597 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 1403289 + ... + 1403361.

Almost surely, 2^102442725 is an apocalyptic number.

102442725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102442725 is an abundant number, since it is smaller than the sum of its proper divisors (138262107).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102442725 is an equidigital number, since it uses as much as digits as its factorization.

102442725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 102442725 is about 10121.3993597723. The cubic root of 102442725 is about 467.9078960760.

Adding to 102442725 its reverse (527244201), we get a palindrome (629686926).

The spelling of 102442725 in words is "one hundred two million, four hundred forty-two thousand, seven hundred twenty-five".