1252536646 has 8 divisors (see below), whose sum is σ = 1888246800. Its totient is φ = 623121048.

The previous prime is 1252536643. The next prime is 1252536647. The reversal of 1252536646 is 6466352521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1252536599 and 1252536608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252536643) 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, 1573141 + ... + 1573936.

It is an arithmetic number, because the mean of its divisors is an integer number (236030850).

Almost surely, 2^1252536646 is an apocalyptic number.

1252536646 is a deficient number, since it is larger than the sum of its proper divisors (635710154).

1252536646 is a wasteful number, since it uses less digits than its factorization.

1252536646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147278.

The product of its digits is 259200, while the sum is 40.

The square root of 1252536646 is about 35391.1944698113. The cubic root of 1252536646 is about 1077.9455244208.

The spelling of 1252536646 in words is "one billion, two hundred fifty-two million, five hundred thirty-six thousand, six hundred forty-six".