3506240261 has 4 divisors (see below), whose sum is σ = 3506360352. Its totient is φ = 3506120172.

The previous prime is 3506240249. The next prime is 3506240291. The reversal of 3506240261 is 1620426053.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3506240261 - 2¹⁸ = 3505978117 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 (3506240291) 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, 15086 + ... + 85088.

It is an arithmetic number, because the mean of its divisors is an integer number (876590088).

Almost surely, 2^3506240261 is an apocalyptic number.

It is an amenable number.

3506240261 is a deficient number, since it is larger than the sum of its proper divisors (120091).

3506240261 is an equidigital number, since it uses as much as digits as its factorization.

3506240261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120090.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 3506240261 is about 59213.5141753975. The cubic root of 3506240261 is about 1519.1962886626.

The spelling of 3506240261 in words is "three billion, five hundred six million, two hundred forty thousand, two hundred sixty-one".