1242631 has 8 divisors (see below), whose sum is σ = 1361024. Its totient is φ = 1127520.

The previous prime is 1242629. The next prime is 1242641. The reversal of 1242631 is 1362421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242631 - 2¹ = 1242629 is a prime.

It is a super-2 number, since 2×1242631² = 3088263604322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242599 and 1242608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10 + ... + 1576.

It is an arithmetic number, because the mean of its divisors is an integer number (170128).

2^1242631 is an apocalyptic number.

1242631 is a deficient number, since it is larger than the sum of its proper divisors (118393).

1242631 is a wasteful number, since it uses less digits than its factorization.

1242631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641.

The product of its digits is 288, while the sum is 19.

The square root of 1242631 is about 1114.7336004625. The cubic root of 1242631 is about 107.5096367781.

The spelling of 1242631 in words is "one million, two hundred forty-two thousand, six hundred thirty-one".