742087317253 has 4 divisors (see below), whose sum is σ = 743762458368. Its totient is φ = 740412176140.

The previous prime is 742087317239. The next prime is 742087317269. The reversal of 742087317253 is 352713780247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 352713780247 = 14051 ⋅25102397.

It is a cyclic number.

It is not a de Polignac number, because 742087317253 - 2³³ = 733497382661 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 742087317197 and 742087317206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742087317203) 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, 837569893 + ... + 837570778.

It is an arithmetic number, because the mean of its divisors is an integer number (185940614592).

Almost surely, 2^742087317253 is an apocalyptic number.

It is an amenable number.

742087317253 is a deficient number, since it is larger than the sum of its proper divisors (1675141115).

742087317253 is a wasteful number, since it uses less digits than its factorization.

742087317253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675141114.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 742087317253 in words is "seven hundred forty-two billion, eighty-seven million, three hundred seventeen thousand, two hundred fifty-three".