774139 has 4 divisors (see below), whose sum is σ = 787320. Its totient is φ = 760960.

The previous prime is 774133. The next prime is 774143. The reversal of 774139 is 931477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931477 = 23 ⋅40499.

It is a cyclic number.

It is not a de Polignac number, because 774139 - 2³ = 774131 is a prime.

It is a d-powerful number, because it can be written as 7 + 7 + 1 + 4⁸ + 3¹¹ + 9⁶ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 774139.

It is not an unprimeable number, because it can be changed into a prime (774131) 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, 6502 + ... + 6619.

It is an arithmetic number, because the mean of its divisors is an integer number (196830).

2⁷⁷⁴¹³⁹ is an apocalyptic number.

774139 is a deficient number, since it is larger than the sum of its proper divisors (13181).

774139 is a wasteful number, since it uses less digits than its factorization.

774139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180.

The product of its digits is 5292, while the sum is 31.

The square root of 774139 is about 879.8516920482. The cubic root of 774139 is about 91.8204990904.

The spelling of 774139 in words is "seven hundred seventy-four thousand, one hundred thirty-nine".