1242653023 has 4 divisors (see below), whose sum is σ = 1244661160. Its totient is φ = 1240644888.

The previous prime is 1242652967. The next prime is 1242653047. The reversal of 1242653023 is 3203562421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1242653023 - 2²¹ = 1240555871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242652982 and 1242653000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242653053) 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, 1003140 + ... + 1004377.

It is an arithmetic number, because the mean of its divisors is an integer number (311165290).

Almost surely, 2^1242653023 is an apocalyptic number.

1242653023 is a deficient number, since it is larger than the sum of its proper divisors (2008137).

1242653023 is an equidigital number, since it uses as much as digits as its factorization.

1242653023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008136.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 1242653023 is about 35251.2839907995. The cubic root of 1242653023 is about 1075.1027190110.

The spelling of 1242653023 in words is "one billion, two hundred forty-two million, six hundred fifty-three thousand, twenty-three".