1425721770 has 128 divisors (see below), whose sum is σ = 4164929280. Its totient is φ = 344183040.

The previous prime is 1425721763. The next prime is 1425721771. The reversal of 1425721770 is 771275241.

1425721770 is a `hidden beast` number, since 1 + 4 + 2 + 572 + 17 + 70 = 666.

It is not an unprimeable number, because it can be changed into a prime (1425721771) 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 in 63 ways as a sum of consecutive naturals, for example, 821824 + ... + 823556.

It is an arithmetic number, because the mean of its divisors is an integer number (32538510).

Almost surely, 2^1425721770 is an apocalyptic number.

1425721770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1425721770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2082464640).

1425721770 is an abundant number, since it is smaller than the sum of its proper divisors (2739207510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1425721770 is a wasteful number, since it uses less digits than its factorization.

1425721770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037 (or 2031 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The square root of 1425721770 is about 37758.7310432965. The cubic root of 1425721770 is about 1125.4985168393.

The spelling of 1425721770 in words is "one billion, four hundred twenty-five million, seven hundred twenty-one thousand, seven hundred seventy".