1252563653 has 8 divisors (see below), whose sum is σ = 1399761216. Its totient is φ = 1110920800.

The previous prime is 1252563643. The next prime is 1252563671. The reversal of 1252563653 is 3563652521.

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

It is not a de Polignac number, because 1252563653 - 2⁶ = 1252563589 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 (1252563643) 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, 1388201 + ... + 1389102.

It is an arithmetic number, because the mean of its divisors is an integer number (174970152).

Almost surely, 2^1252563653 is an apocalyptic number.

It is an amenable number.

1252563653 is a deficient number, since it is larger than the sum of its proper divisors (147197563).

1252563653 is a wasteful number, since it uses less digits than its factorization.

1252563653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777355.

The product of its digits is 162000, while the sum is 38.

The square root of 1252563653 is about 35391.5760174649. The cubic root of 1252563653 is about 1077.9532718629.

The spelling of 1252563653 in words is "one billion, two hundred fifty-two million, five hundred sixty-three thousand, six hundred fifty-three".