261045429 has 4 divisors (see below), whose sum is σ = 348060576. Its totient is φ = 174030284.

The previous prime is 261045383. The next prime is 261045461. The reversal of 261045429 is 924540162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 261045429 - 2¹³ = 261037237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261045429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261045479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43507569 + ... + 43507574.

It is an arithmetic number, because the mean of its divisors is an integer number (87015144).

Almost surely, 2^261045429 is an apocalyptic number.

It is an amenable number.

261045429 is a deficient number, since it is larger than the sum of its proper divisors (87015147).

261045429 is an equidigital number, since it uses as much as digits as its factorization.

261045429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87015146.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 261045429 is about 16156.9003524810. The cubic root of 261045429 is about 639.1047288554.

The spelling of 261045429 in words is "two hundred sixty-one million, forty-five thousand, four hundred twenty-nine".