78253001 has 4 divisors (see below), whose sum is σ = 82371600. Its totient is φ = 74134404.

The previous prime is 78252973. The next prime is 78253003. The reversal of 78253001 is 10035287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78253001 - 2¹⁴ = 78236617 is a prime.

It is a super-2 number, since 2×78253001² = 12247064331012002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78253003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059271 + ... + 2059308.

It is an arithmetic number, because the mean of its divisors is an integer number (20592900).

Almost surely, 2^78253001 is an apocalyptic number.

It is an amenable number.

78253001 is a deficient number, since it is larger than the sum of its proper divisors (4118599).

78253001 is a wasteful number, since it uses less digits than its factorization.

78253001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118598.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 78253001 is about 8846.0726313998. The cubic root of 78253001 is about 427.7273298180.

Adding to 78253001 its reverse (10035287), we get a palindrome (88288288).

The spelling of 78253001 in words is "seventy-eight million, two hundred fifty-three thousand, one".