742172140 has 12 divisors (see below), whose sum is σ = 1558561536. Its totient is φ = 296868848.

The previous prime is 742172117. The next prime is 742172143. The reversal of 742172140 is 41271247.

It is a junction number, because it is equal to n+sod(n) for n = 742172099 and 742172108.

It is not an unprimeable number, because it can be changed into a prime (742172143) 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, 18554284 + ... + 18554323.

It is an arithmetic number, because the mean of its divisors is an integer number (129880128).

Almost surely, 2^742172140 is an apocalyptic number.

It is an amenable number.

742172140 is an abundant number, since it is smaller than the sum of its proper divisors (816389396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

742172140 is a wasteful number, since it uses less digits than its factorization.

742172140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37108616 (or 37108614 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 742172140 is about 27242.8364896169. The cubic root of 742172140 is about 905.3883094990.

The spelling of 742172140 in words is "seven hundred forty-two million, one hundred seventy-two thousand, one hundred forty".