1542452152621 has 4 divisors (see below), whose sum is σ = 1543131948700. Its totient is φ = 1541772356544.

The previous prime is 1542452152613. The next prime is 1542452152721. The reversal of 1542452152621 is 1262512542451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 440645043721 + 1101807108900 = 663811^2 + 1049670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542452152621 - 2³ = 1542452152613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542452152421) 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, 339894636 + ... + 339899173.

It is an arithmetic number, because the mean of its divisors is an integer number (385782987175).

Almost surely, 2^{1542452152621} is an apocalyptic number.

It is an amenable number.

1542452152621 is a deficient number, since it is larger than the sum of its proper divisors (679796079).

1542452152621 is an equidigital number, since it uses as much as digits as its factorization.

1542452152621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679796078.

The product of its digits is 192000, while the sum is 40.

The spelling of 1542452152621 in words is "one trillion, five hundred forty-two billion, four hundred fifty-two million, one hundred fifty-two thousand, six hundred twenty-one".