1242420523402 has 8 divisors (see below), whose sum is σ = 1863638142912. Its totient is φ = 621207809100.

The previous prime is 1242420523391. The next prime is 1242420523411. The reversal of 1242420523402 is 2043250242421.

It is a happy number.

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, 509224 + ... + 1656547.

It is an arithmetic number, because the mean of its divisors is an integer number (232954767864).

Almost surely, 2^{1242420523402} is an apocalyptic number.

1242420523402 is a deficient number, since it is larger than the sum of its proper divisors (621217619510).

1242420523402 is a wasteful number, since it uses less digits than its factorization.

1242420523402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452604.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 1242420523402 its reverse (2043250242421), we get a palindrome (3285670765823).

The spelling of 1242420523402 in words is "one trillion, two hundred forty-two billion, four hundred twenty million, five hundred twenty-three thousand, four hundred two".