1425174129520 has 80 divisors (see below), whose sum is σ = 3380658570432. Its totient is φ = 558591713280.

The previous prime is 1425174129437. The next prime is 1425174129523. The reversal of 1425174129520 is 259214715241.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1425174129520² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425174129523) 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, 728224 + ... + 1838656.

Almost surely, 2^{1425174129520} is an apocalyptic number.

1425174129520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1425174129520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1690329285216).

1425174129520 is an abundant number, since it is smaller than the sum of its proper divisors (1955484440912).

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

1425174129520 is a wasteful number, since it uses less digits than its factorization.

1425174129520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110770 (or 1110764 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 1425174129520 in words is "one trillion, four hundred twenty-five billion, one hundred seventy-four million, one hundred twenty-nine thousand, five hundred twenty".