491111425 has 12 divisors (see below), whose sum is σ = 695975296. Its totient is φ = 336762000.

The previous prime is 491111377. The next prime is 491111431. The reversal of 491111425 is 524111194.

It is not a de Polignac number, because 491111425 - 2¹⁹ = 490587137 is a prime.

It is a super-3 number, since 3×491111425³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491111393 and 491111402.

It is an unprimeable 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 11 ways as a sum of consecutive naturals, for example, 1403001 + ... + 1403350.

Almost surely, 2^491111425 is an apocalyptic number.

It is an amenable number.

491111425 is a deficient number, since it is larger than the sum of its proper divisors (204863871).

491111425 is a wasteful number, since it uses less digits than its factorization.

491111425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806368 (or 2806363 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 491111425 is about 22161.0339334608. The cubic root of 491111425 is about 788.9691328993.

It can be divided in two parts, 491111 and 425, that added together give a triangular number (491536 = T₉₉₁).

The spelling of 491111425 in words is "four hundred ninety-one million, one hundred eleven thousand, four hundred twenty-five".