740631 has 8 divisors (see below), whose sum is σ = 1021680. Its totient is φ = 476672.

The previous prime is 740603. The next prime is 740651. The reversal of 740631 is 136047.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 740631 - 2⁵ = 740599 is a prime.

It is a super-2 number, since 2×740631² = 1097068556322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 740598 and 740607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740651) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4170 + ... + 4343.

It is an arithmetic number, because the mean of its divisors is an integer number (127710).

2⁷⁴⁰⁶³¹ is an apocalyptic number.

740631 is a deficient number, since it is larger than the sum of its proper divisors (281049).

740631 is a wasteful number, since it uses less digits than its factorization.

740631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 740631 is about 860.5992098532. The cubic root of 740631 is about 90.4761187662.

Adding to 740631 its reverse (136047), we get a palindrome (876678).

The spelling of 740631 in words is "seven hundred forty thousand, six hundred thirty-one".