245392157 has 4 divisors (see below), whose sum is σ = 245622780. Its totient is φ = 245161536.

The previous prime is 245392153. The next prime is 245392183. The reversal of 245392157 is 751293542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751293542 = 2 ⋅375646771.

It can be written as a sum of positive squares in 2 ways, for example, as 49084036 + 196308121 = 7006^2 + 14011^2 .

It is a cyclic number.

It is not a de Polignac number, because 245392157 - 2² = 245392153 is a prime.

It is a super-2 number, since 2×245392157² = 120434621434225298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245392157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245392153) 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 3 ways as a sum of consecutive naturals, for example, 113708 + ... + 115845.

It is an arithmetic number, because the mean of its divisors is an integer number (61405695).

Almost surely, 2^245392157 is an apocalyptic number.

It is an amenable number.

245392157 is a deficient number, since it is larger than the sum of its proper divisors (230623).

245392157 is a wasteful number, since it uses less digits than its factorization.

245392157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230622.

The product of its digits is 75600, while the sum is 38.

The square root of 245392157 is about 15664.9978295562. The cubic root of 245392157 is about 626.0661542434.

The spelling of 245392157 in words is "two hundred forty-five million, three hundred ninety-two thousand, one hundred fifty-seven".