742399 has 12 divisors (see below), whose sum is σ = 877800. Its totient is φ = 625968.

The previous prime is 742393. The next prime is 742409. The reversal of 742399 is 993247.

742399 = T₁₄₉ + T₁₅₀ + ... + T₁₉₇.

It is not a de Polignac number, because 742399 - 2¹¹ = 740351 is a prime.

742399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5272 + ... + 5410.

It is an arithmetic number, because the mean of its divisors is an integer number (73150).

2⁷⁴²³⁹⁹ is an apocalyptic number.

742399 is a deficient number, since it is larger than the sum of its proper divisors (135401).

742399 is a wasteful number, since it uses less digits than its factorization.

742399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 255 counting only the distinct ones).

The product of its digits is 13608, while the sum is 34.

The square root of 742399 is about 861.6257888434. The cubic root of 742399 is about 90.5480550214.

The spelling of 742399 in words is "seven hundred forty-two thousand, three hundred ninety-nine".