245052391 has 8 divisors (see below), whose sum is σ = 249238080. Its totient is φ = 240893952.

The previous prime is 245052389. The next prime is 245052463. The reversal of 245052391 is 193250542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245052391 - 2¹ = 245052389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245052491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11751 + ... + 25063.

It is an arithmetic number, because the mean of its divisors is an integer number (31154760).

Almost surely, 2^245052391 is an apocalyptic number.

245052391 is a deficient number, since it is larger than the sum of its proper divisors (4185689).

245052391 is a wasteful number, since it uses less digits than its factorization.

245052391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13625.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 245052391 is about 15654.1493221446. The cubic root of 245052391 is about 625.7770737698. Note that the first 3 decimals are identical.

It can be divided in two parts, 24505 and 2391, that added together give a square (26896 = 164²).

The spelling of 245052391 in words is "two hundred forty-five million, fifty-two thousand, three hundred ninety-one".