1020425 has 30 divisors (see below), whose sum is σ = 1562958. Its totient is φ = 658560.

The previous prime is 1020419. The next prime is 1020431. The reversal of 1020425 is 5240201.

1020425 = T₁₇₄ + T₁₇₅ + ... + T₂₂₄.

It is an interprime number because it is at equal distance from previous prime (1020419) and next prime (1020431).

It can be written as a sum of positive squares in 3 ways, for example, as 153664 + 866761 = 392^2 + 931^2 .

It is not a de Polignac number, because 1020425 - 2⁶ = 1020361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 60017 + ... + 60033.

2^1020425 is an apocalyptic number.

It is an amenable number.

1020425 is a deficient number, since it is larger than the sum of its proper divisors (542533).

1020425 is an frugal number, since it uses more digits than its factorization.

1020425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1020425 is about 1010.1608782763. The cubic root of 1020425 is about 100.6762498856.

Adding to 1020425 its reverse (5240201), we get a palindrome (6260626).

The spelling of 1020425 in words is "one million, twenty thousand, four hundred twenty-five".