1290988 has 6 divisors (see below), whose sum is σ = 2259236. Its totient is φ = 645492.

The previous prime is 1290983. The next prime is 1291001. The reversal of 1290988 is 8890921.

It is a super-2 number, since 2×1290988² = 3333300032288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1290983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161370 + ... + 161377.

2^1290988 is an apocalyptic number.

It is an amenable number.

1290988 is a deficient number, since it is larger than the sum of its proper divisors (968248).

1290988 is a wasteful number, since it uses less digits than its factorization.

1290988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322751 (or 322749 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1290988 is about 1136.2165286599. The cubic root of 1290988 is about 108.8865075759.

It can be divided in two parts, 1290 and 988, that added together give a triangular number (2278 = T₆₇).

The spelling of 1290988 in words is "one million, two hundred ninety thousand, nine hundred eighty-eight".