154254401242 has 4 divisors (see below), whose sum is σ = 231381601866. Its totient is φ = 77127200620.

The previous prime is 154254401233. The next prime is 154254401267. The reversal of 154254401242 is 242104452451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242104452451 = 1021 ⋅237124831.

It can be written as a sum of positive squares in only one way, i.e., 89412362361 + 64842038881 = 299019^2 + 254641^2 .

It is a super-2 number, since 2×154254401242² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 154254401198 and 154254401207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38563600309 + ... + 38563600312.

Almost surely, 2^154254401242 is an apocalyptic number.

154254401242 is a deficient number, since it is larger than the sum of its proper divisors (77127200624).

154254401242 is an equidigital number, since it uses as much as digits as its factorization.

154254401242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77127200623.

The product of its (nonzero) digits is 51200, while the sum is 34.

Adding to 154254401242 its reverse (242104452451), we get a palindrome (396358853693).

The spelling of 154254401242 in words is "one hundred fifty-four billion, two hundred fifty-four million, four hundred one thousand, two hundred forty-two".