3125405030261 has 4 divisors (see below), whose sum is σ = 3125959284000. Its totient is φ = 3124850776524.

The previous prime is 3125405030239. The next prime is 3125405030263. The reversal of 3125405030261 is 1620305045213.

It is a happy number.

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 3125405030261 - 2³⁸ = 2850527123317 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 (3125405030263) 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, 277118411 + ... + 277129688.

It is an arithmetic number, because the mean of its divisors is an integer number (781489821000).

Almost surely, 2^{3125405030261} is an apocalyptic number.

It is an amenable number.

3125405030261 is a deficient number, since it is larger than the sum of its proper divisors (554253739).

3125405030261 is an equidigital number, since it uses as much as digits as its factorization.

3125405030261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554253738.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 3125405030261 in words is "three trillion, one hundred twenty-five billion, four hundred five million, thirty thousand, two hundred sixty-one".