1290172 has 24 divisors (see below), whose sum is σ = 2492336. Its totient is φ = 580608.

The previous prime is 1290169. The next prime is 1290173. The reversal of 1290172 is 2710921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1948 + ... + 2524.

2^1290172 is an apocalyptic number.

It is an amenable number.

1290172 is a deficient number, since it is larger than the sum of its proper divisors (1202164).

1290172 is a wasteful number, since it uses less digits than its factorization.

1290172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1290172 is about 1135.8573854142. The cubic root of 1290172 is about 108.8635612958.

The spelling of 1290172 in words is "one million, two hundred ninety thousand, one hundred seventy-two".