1249642 has 8 divisors (see below), whose sum is σ = 1879776. Its totient is φ = 623052.

The previous prime is 1249631. The next prime is 1249643. The reversal of 1249642 is 2469421.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1249642.

It is not an unprimeable number, because it can be changed into a prime (1249643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333 + ... + 1615.

It is an arithmetic number, because the mean of its divisors is an integer number (234972).

2^1249642 is an apocalyptic number.

1249642 is a deficient number, since it is larger than the sum of its proper divisors (630134).

1249642 is a wasteful number, since it uses less digits than its factorization.

1249642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772.

The product of its digits is 3456, while the sum is 28.

The square root of 1249642 is about 1117.8738748177. The cubic root of 1249642 is about 107.7114496848.

It can be divided in two parts, 1249 and 642, that added together give a triangular number (1891 = T₆₁).

The spelling of 1249642 in words is "one million, two hundred forty-nine thousand, six hundred forty-two".