155245442 has 8 divisors (see below), whose sum is σ = 254038032. Its totient is φ = 70566100.

The previous prime is 155245429. The next prime is 155245463. The reversal of 155245442 is 244542551.

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

It is a super-2 number, since 2×155245442² = 48202294523550728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155245399 and 155245408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3528284 + ... + 3528327.

It is an arithmetic number, because the mean of its divisors is an integer number (31754754).

Almost surely, 2^155245442 is an apocalyptic number.

155245442 is a deficient number, since it is larger than the sum of its proper divisors (98792590).

155245442 is a wasteful number, since it uses less digits than its factorization.

155245442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7056624.

The product of its digits is 32000, while the sum is 32.

The square root of 155245442 is about 12459.7528867951. The cubic root of 155245442 is about 537.4519208482.

Adding to 155245442 its reverse (244542551), we get a palindrome (399787993).

The spelling of 155245442 in words is "one hundred fifty-five million, two hundred forty-five thousand, four hundred forty-two".