78281253 has 12 divisors (see below), whose sum is σ = 113169888. Its totient is φ = 52142760.

The previous prime is 78281249. The next prime is 78281257. The reversal of 78281253 is 35218287.

It is an interprime number because it is at equal distance from previous prime (78281249) and next prime (78281257).

It is not a de Polignac number, because 78281253 - 2² = 78281249 is a prime.

It is a super-2 number, since 2×78281253² = 12255909142500018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78281257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10018 + ... + 16028.

It is an arithmetic number, because the mean of its divisors is an integer number (9430824).

Almost surely, 2^78281253 is an apocalyptic number.

It is an amenable number.

78281253 is a deficient number, since it is larger than the sum of its proper divisors (34888635).

78281253 is a wasteful number, since it uses less digits than its factorization.

78281253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464 (or 7461 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 78281253 is about 8847.6693541294. The cubic root of 78281253 is about 427.7787983384.

The spelling of 78281253 in words is "seventy-eight million, two hundred eighty-one thousand, two hundred fifty-three".