1425440025 has 45 divisors (see below), whose sum is σ = 2643558511. Its totient is φ = 759328560.

The previous prime is 1425439997. The next prime is 1425440033. The reversal of 1425440025 is 5200445241.

The square root of 1425440025 is 37755.

It is a perfect power (a square), and thus also a powerful number.

1425440025 is a `hidden beast` number, since 1 + 4 + 254 + 400 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 513158409 + 912281616 = 22653^2 + 30204^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 1425440025 - 2⁵ = 1425439993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1698556 + ... + 1699394.

Almost surely, 2^1425440025 is an apocalyptic number.

1425440025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1425440025 is the 37755-th square number.

1425440025 is the 18878-th centered octagonal number.

It is an amenable number.

1425440025 is a deficient number, since it is larger than the sum of its proper divisors (1218118486).

1425440025 is an frugal number, since it uses more digits than its factorization.

1425440025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The cubic root of 1425440025 is about 1125.4243732309.

Multiplying 1425440025 by its product of nonzero digits (6400), we get a square (9122816160000 = 3020400²).

Adding to 1425440025 its reverse (5200445241), we get a palindrome (6625885266).

The spelling of 1425440025 in words is "one billion, four hundred twenty-five million, four hundred forty thousand, twenty-five".