78249201 has 16 divisors (see below), whose sum is σ = 110011200. Its totient is φ = 49336128.

The previous prime is 78249179. The next prime is 78249229. The reversal of 78249201 is 10294287.

It is a happy number.

It is not a de Polignac number, because 78249201 - 2⁵ = 78249169 is a prime.

It is a super-2 number, since 2×78249201² = 12245874914276802, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78249251) 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, 63055 + ... + 64283.

It is an arithmetic number, because the mean of its divisors is an integer number (6875700).

Almost surely, 2^78249201 is an apocalyptic number.

It is an amenable number.

78249201 is a deficient number, since it is larger than the sum of its proper divisors (31761999).

78249201 is a wasteful number, since it uses less digits than its factorization.

78249201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 78249201 is about 8845.8578442116. The cubic root of 78249201 is about 427.7204061637.

The spelling of 78249201 in words is "seventy-eight million, two hundred forty-nine thousand, two hundred one".