740190257 has 4 divisors (see below), whose sum is σ = 740833380. Its totient is φ = 739547136.

The previous prime is 740190247. The next prime is 740190307. The reversal of 740190257 is 752091047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752091047 = 5209 ⋅144383.

It can be written as a sum of positive squares in 2 ways, for example, as 617224336 + 122965921 = 24844^2 + 11089^2 .

It is a cyclic number.

It is not a de Polignac number, because 740190257 - 2²⁰ = 739141681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (740190247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319832 + ... + 322137.

It is an arithmetic number, because the mean of its divisors is an integer number (185208345).

Almost surely, 2^740190257 is an apocalyptic number.

It is an amenable number.

740190257 is a deficient number, since it is larger than the sum of its proper divisors (643123).

740190257 is a wasteful number, since it uses less digits than its factorization.

740190257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643122.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 740190257 is about 27206.4377859359. The cubic root of 740190257 is about 904.5816802383.

The spelling of 740190257 in words is "seven hundred forty million, one hundred ninety thousand, two hundred fifty-seven".