1242653573 has 24 divisors (see below), whose sum is σ = 1552198464. Its totient is φ = 988310400.

The previous prime is 1242653537. The next prime is 1242653611. The reversal of 1242653573 is 3753562421.

It is not a de Polignac number, because 1242653573 - 2¹⁰ = 1242652549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242650573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48638 + ... + 69648.

It is an arithmetic number, because the mean of its divisors is an integer number (64674936).

Almost surely, 2^1242653573 is an apocalyptic number.

It is an amenable number.

1242653573 is a deficient number, since it is larger than the sum of its proper divisors (309544891).

1242653573 is a wasteful number, since it uses less digits than its factorization.

1242653573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21113 (or 21106 counting only the distinct ones).

The product of its digits is 151200, while the sum is 38.

The square root of 1242653573 is about 35251.2917919330. The cubic root of 1242653573 is about 1075.1028776250.

The spelling of 1242653573 in words is "one billion, two hundred forty-two million, six hundred fifty-three thousand, five hundred seventy-three".