245312525421 has 12 divisors (see below), whose sum is σ = 354349211580. Its totient is φ = 163537577280.

The previous prime is 245312525413. The next prime is 245312525443. The reversal of 245312525421 is 124525213542.

245312525421 is a `hidden beast` number, since 2 + 4 + 53 + 12 + 52 + 542 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 119518169796 + 125794355625 = 345714^2 + 354675^2 .

It is not a de Polignac number, because 245312525421 - 2³ = 245312525413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245312525461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61185 + ... + 703113.

It is an arithmetic number, because the mean of its divisors is an integer number (29529100965).

Almost surely, 2^245312525421 is an apocalyptic number.

It is an amenable number.

245312525421 is a deficient number, since it is larger than the sum of its proper divisors (109036686159).

245312525421 is a wasteful number, since it uses less digits than its factorization.

245312525421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684396 (or 684393 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 245312525421 its reverse (124525213542), we get a palindrome (369837738963).

The spelling of 245312525421 in words is "two hundred forty-five billion, three hundred twelve million, five hundred twenty-five thousand, four hundred twenty-one".