1252413400405 has 4 divisors (see below), whose sum is σ = 1502896080492. Its totient is φ = 1001930720320.

The previous prime is 1252413400363. The next prime is 1252413400409. The reversal of 1252413400405 is 5040043142521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 348314793124 + 904098607281 = 590182^2 + 950841^2 .

It is not a de Polignac number, because 1252413400405 - 2³⁵ = 1218053662037 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 (1252413400409) 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, 125241340036 + ... + 125241340045.

It is an arithmetic number, because the mean of its divisors is an integer number (375724020123).

Almost surely, 2^{1252413400405} is an apocalyptic number.

It is an amenable number.

1252413400405 is a deficient number, since it is larger than the sum of its proper divisors (250482680087).

1252413400405 is an equidigital number, since it uses as much as digits as its factorization.

1252413400405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250482680086.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 1252413400405 its reverse (5040043142521), we get a palindrome (6292456542926).

The spelling of 1252413400405 in words is "one trillion, two hundred fifty-two billion, four hundred thirteen million, four hundred thousand, four hundred five".