426749506 has 4 divisors (see below), whose sum is σ = 640124262. Its totient is φ = 213374752.

The previous prime is 426749489. The next prime is 426749551. The reversal of 426749506 is 605947624.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 397643481 + 29106025 = 19941^2 + 5395^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106687375 + ... + 106687378.

Almost surely, 2^426749506 is an apocalyptic number.

426749506 is a deficient number, since it is larger than the sum of its proper divisors (213374756).

426749506 is a wasteful number, since it uses less digits than its factorization.

426749506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213374755.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 426749506 is about 20657.9163034416. The cubic root of 426749506 is about 752.8775417003.

The spelling of 426749506 in words is "four hundred twenty-six million, seven hundred forty-nine thousand, five hundred six".