1292890 has 8 divisors (see below), whose sum is σ = 2327220. Its totient is φ = 517152.

The previous prime is 1292887. The next prime is 1292927. The reversal of 1292890 is 982921.

It can be written as a sum of positive squares in 2 ways, for example, as 1292769 + 121 = 1137^2 + 11^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64635 + ... + 64654.

2^1292890 is an apocalyptic number.

1292890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1292890 is a deficient number, since it is larger than the sum of its proper divisors (1034330).

1292890 is a wasteful number, since it uses less digits than its factorization.

1292890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129296.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1292890 is about 1137.0532089573. The cubic root of 1292890 is about 108.9399551456.

Adding to 1292890 its sum of digits (31), we get a palindrome (1292921).

The spelling of 1292890 in words is "one million, two hundred ninety-two thousand, eight hundred ninety".