1252164540426 has 16 divisors (see below), whose sum is σ = 2509117479264. Its totient is φ = 416590113744.

The previous prime is 1252164540421. The next prime is 1252164540463. The reversal of 1252164540426 is 6240454612521.

It is a super-2 number, since 2×1252164540426² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1252164540421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199513201 + ... + 199519476.

It is an arithmetic number, because the mean of its divisors is an integer number (156819842454).

Almost surely, 2^{1252164540426} is an apocalyptic number.

1252164540426 is an abundant number, since it is smaller than the sum of its proper divisors (1256952938838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252164540426 is a wasteful number, since it uses less digits than its factorization.

1252164540426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399033205.

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 1252164540426 in words is "one trillion, two hundred fifty-two billion, one hundred sixty-four million, five hundred forty thousand, four hundred twenty-six".