151520042 has 4 divisors (see below), whose sum is σ = 227280066. Its totient is φ = 75760020.

The previous prime is 151520029. The next prime is 151520059. The reversal of 151520042 is 240025151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240025151 = 421 ⋅570131.

It can be written as a sum of positive squares in only one way, i.e., 119924401 + 31595641 = 10951^2 + 5621^2 .

It is a junction number, because it is equal to n+sod(n) for n = 151519996 and 151520023.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37880009 + ... + 37880012.

Almost surely, 2^151520042 is an apocalyptic number.

151520042 is a deficient number, since it is larger than the sum of its proper divisors (75760024).

151520042 is an equidigital number, since it uses as much as digits as its factorization.

151520042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75760023.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 151520042 is about 12309.3477487639. The cubic root of 151520042 is about 533.1180178596.

Adding to 151520042 its reverse (240025151), we get a palindrome (391545193).

The spelling of 151520042 in words is "one hundred fifty-one million, five hundred twenty thousand, forty-two".