1277425 has 12 divisors (see below), whose sum is σ = 1627996. Its totient is φ = 993600.

The previous prime is 1277387. The next prime is 1277429. The reversal of 1277425 is 5247721.

It can be written as a sum of positive squares in 6 ways, for example, as 5041 + 1272384 = 71^2 + 1128^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1277425 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1277393 and 1277402.

It is not an unprimeable number, because it can be changed into a prime (1277429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235 + ... + 1615.

2^1277425 is an apocalyptic number.

It is an amenable number.

1277425 is a deficient number, since it is larger than the sum of its proper divisors (350571).

1277425 is a wasteful number, since it uses less digits than its factorization.

1277425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428 (or 1423 counting only the distinct ones).

The product of its digits is 3920, while the sum is 28.

The square root of 1277425 is about 1130.2322770121. The cubic root of 1277425 is about 108.5038471882.

The spelling of 1277425 in words is "one million, two hundred seventy-seven thousand, four hundred twenty-five".