155142002 has 4 divisors (see below), whose sum is σ = 232713006. Its totient is φ = 77571000.

The previous prime is 155141981. The next prime is 155142047. The reversal of 155142002 is 200241551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200241551 = 19 ⋅10539029.

It can be written as a sum of positive squares in only one way, i.e., 139452481 + 15689521 = 11809^2 + 3961^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38785499 + ... + 38785502.

Almost surely, 2^155142002 is an apocalyptic number.

155142002 is a deficient number, since it is larger than the sum of its proper divisors (77571004).

155142002 is an equidigital number, since it uses as much as digits as its factorization.

155142002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77571003.

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

The square root of 155142002 is about 12455.6012299688. The cubic root of 155142002 is about 537.3325262990.

Adding to 155142002 its reverse (200241551), we get a palindrome (355383553).

The spelling of 155142002 in words is "one hundred fifty-five million, one hundred forty-two thousand, two".