261245453 has 8 divisors (see below), whose sum is σ = 299321472. Its totient is φ = 223358256.

The previous prime is 261245429. The next prime is 261245461. The reversal of 261245453 is 354542162.

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 261245453 - 2²² = 257051149 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 (261245483) 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 7 ways as a sum of consecutive naturals, for example, 44225 + ... + 49782.

It is an arithmetic number, because the mean of its divisors is an integer number (37415184).

Almost surely, 2^261245453 is an apocalyptic number.

It is an amenable number.

261245453 is a deficient number, since it is larger than the sum of its proper divisors (38076019).

261245453 is an equidigital number, since it uses as much as digits as its factorization.

261245453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94411.

The product of its digits is 28800, while the sum is 32.

The square root of 261245453 is about 16163.0892158646. The cubic root of 261245453 is about 639.2679234987.

The spelling of 261245453 in words is "two hundred sixty-one million, two hundred forty-five thousand, four hundred fifty-three".