1645420526 has 4 divisors (see below), whose sum is σ = 2468130792. Its totient is φ = 822710262.

The previous prime is 1645420523. The next prime is 1645420537. The reversal of 1645420526 is 6250245461.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645420523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411355130 + ... + 411355133.

It is an arithmetic number, because the mean of its divisors is an integer number (617032698).

Almost surely, 2^1645420526 is an apocalyptic number.

1645420526 is a deficient number, since it is larger than the sum of its proper divisors (822710266).

1645420526 is an equidigital number, since it uses as much as digits as its factorization.

1645420526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822710265.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 1645420526 is about 40563.7834280778. The cubic root of 1645420526 is about 1180.5715238699.

Adding to 1645420526 its reverse (6250245461), we get a palindrome (7895665987).

The spelling of 1645420526 in words is "one billion, six hundred forty-five million, four hundred twenty thousand, five hundred twenty-six".