742140 has 144 divisors (see below), whose sum is σ = 2795520. Its totient is φ = 155520.

The previous prime is 742127. The next prime is 742151. The reversal of 742140 is 41247.

742140 = T₁₃₄ + T₁₃₅ + ... + T₁₈₉.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

742140 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23925 + ... + 23955.

2⁷⁴²¹⁴⁰ is an apocalyptic number.

742140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 742140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397760).

742140 is an abundant number, since it is smaller than the sum of its proper divisors (2053380).

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

742140 is a wasteful number, since it uses less digits than its factorization.

742140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 742140 is about 861.4754784670. The cubic root of 742140 is about 90.5375239934.

Adding to 742140 its reverse (41247), we get a palindrome (783387).

The spelling of 742140 in words is "seven hundred forty-two thousand, one hundred forty", and thus it is an iban number.