1425637 has 6 divisors (see below), whose sum is σ = 1514738. Its totient is φ = 1341504.

The previous prime is 1425629. The next prime is 1425649. The reversal of 1425637 is 7365241.

It is a Cunningham number, because it is equal to 1194²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 443556 + 982081 = 666^2 + 991^2 .

It is not a de Polignac number, because 1425637 - 2³ = 1425629 is a prime.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2178 + ... + 2755.

2^1425637 is an apocalyptic number.

1425637 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1425637 is a deficient number, since it is larger than the sum of its proper divisors (89101).

1425637 is an equidigital number, since it uses as much as digits as its factorization.

1425637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967 (or 4950 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 1425637 is about 1194.0004187604. Note that the first 3 decimals coincide. The cubic root of 1425637 is about 112.5476209916.

It can be divided in two parts, 14 and 25637, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 1425637 in words is "one million, four hundred twenty-five thousand, six hundred thirty-seven".