651242 has 8 divisors (see below), whose sum is σ = 993600. Its totient is φ = 320044.

The previous prime is 651239. The next prime is 651247. The reversal of 651242 is 242156.

It is a happy number.

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

It is a super-2 number, since 2×651242² = 848232285128, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 651242.

It is not an unprimeable number, because it can be changed into a prime (651247) 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, 2642 + ... + 2877.

It is an arithmetic number, because the mean of its divisors is an integer number (124200).

2⁶⁵¹²⁴² is an apocalyptic number.

651242 is a deficient number, since it is larger than the sum of its proper divisors (342358).

651242 is a wasteful number, since it uses less digits than its factorization.

651242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580.

The product of its digits is 480, while the sum is 20.

The square root of 651242 is about 806.9956629375. The cubic root of 651242 is about 86.6790481982.

Adding to 651242 its reverse (242156), we get a palindrome (893398).

The spelling of 651242 in words is "six hundred fifty-one thousand, two hundred forty-two".