1425465821 has 24 divisors (see below), whose sum is σ = 1574830656. Its totient is φ = 1289433600.

The previous prime is 1425465791. The next prime is 1425465829. The reversal of 1425465821 is 1285645241.

It is a happy number.

It is not a de Polignac number, because 1425465821 - 2⁶ = 1425465757 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425465829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2117741 + ... + 2118413.

It is an arithmetic number, because the mean of its divisors is an integer number (65617944).

Almost surely, 2^1425465821 is an apocalyptic number.

It is an amenable number.

1425465821 is a deficient number, since it is larger than the sum of its proper divisors (149364835).

1425465821 is a wasteful number, since it uses less digits than its factorization.

1425465821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933 (or 920 counting only the distinct ones).

The product of its digits is 76800, while the sum is 38.

The square root of 1425465821 is about 37755.3416220804. The cubic root of 1425465821 is about 1125.4311620754.

The spelling of 1425465821 in words is "one billion, four hundred twenty-five million, four hundred sixty-five thousand, eight hundred twenty-one".