1252125401 has 4 divisors (see below), whose sum is σ = 1263612900. Its totient is φ = 1240637904.

The previous prime is 1252125383. The next prime is 1252125421. The reversal of 1252125401 is 1045212521.

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 611276176 + 640849225 = 24724^2 + 25315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252125401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1252125421) 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, 5743586 + ... + 5743803.

It is an arithmetic number, because the mean of its divisors is an integer number (315903225).

Almost surely, 2^1252125401 is an apocalyptic number.

It is an amenable number.

1252125401 is a deficient number, since it is larger than the sum of its proper divisors (11487499).

1252125401 is a wasteful number, since it uses less digits than its factorization.

1252125401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487498.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1252125401 is about 35385.3840024381. The cubic root of 1252125401 is about 1077.8275376580.

Adding to 1252125401 its reverse (1045212521), we get a palindrome (2297337922).

The spelling of 1252125401 in words is "one billion, two hundred fifty-two million, one hundred twenty-five thousand, four hundred one".