742770 has 80 divisors (see below), whose sum is σ = 2299968. Its totient is φ = 168480.

The previous prime is 742759. The next prime is 742783. The reversal of 742770 is 77247.

It is a happy number.

742770 is nontrivially palindromic in base 8.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

742770 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5605 + ... + 5735.

2⁷⁴²⁷⁷⁰ is an apocalyptic number.

742770 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 742770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149984).

742770 is an abundant number, since it is smaller than the sum of its proper divisors (1557198).

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

742770 is a wasteful number, since it uses less digits than its factorization.

742770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 742770 is about 861.8410526309. The cubic root of 742770 is about 90.5631357413.

The spelling of 742770 in words is "seven hundred forty-two thousand, seven hundred seventy", and thus it is an iban number.