1215625 has 12 divisors (see below), whose sum is σ = 1523340. Its totient is φ = 970000.

The previous prime is 1215623. The next prime is 1215629. The reversal of 1215625 is 5265121.

It can be written as a sum of positive squares in 6 ways, for example, as 1115136 + 100489 = 1056^2 + 317^2 .

It is not a de Polignac number, because 1215625 - 2¹ = 1215623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215596 and 1215605.

It is not an unprimeable number, because it can be changed into a prime (1215623) 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, 2931 + ... + 3319.

It is an arithmetic number, because the mean of its divisors is an integer number (126945).

2^1215625 is an apocalyptic number.

It is an amenable number.

1215625 is a deficient number, since it is larger than the sum of its proper divisors (307715).

1215625 is an frugal number, since it uses more digits than its factorization.

1215625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 394 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 1215625 is about 1102.5538535600. The cubic root of 1215625 is about 106.7250927745.

It can be divided in two parts, 1215 and 625, that multiplied together give a 5-th power (759375 = 15⁵).

The spelling of 1215625 in words is "one million, two hundred fifteen thousand, six hundred twenty-five".