1425385221 has 16 divisors (see below), whose sum is σ = 2067812544. Its totient is φ = 868114944.

The previous prime is 1425385219. The next prime is 1425385249. The reversal of 1425385221 is 1225835241.

It is not a de Polignac number, because 1425385221 - 2¹ = 1425385219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425385201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184611 + ... + 192176.

It is an arithmetic number, because the mean of its divisors is an integer number (129238284).

Almost surely, 2^1425385221 is an apocalyptic number.

It is an amenable number.

1425385221 is a deficient number, since it is larger than the sum of its proper divisors (642427323).

1425385221 is a wasteful number, since it uses less digits than its factorization.

1425385221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376900.

The product of its digits is 19200, while the sum is 33.

The square root of 1425385221 is about 37754.2742083595. The cubic root of 1425385221 is about 1125.4099499541.

The spelling of 1425385221 in words is "one billion, four hundred twenty-five million, three hundred eighty-five thousand, two hundred twenty-one".