155402073 has 12 divisors (see below), whose sum is σ = 224926000. Its totient is φ = 103390776.

The previous prime is 155402059. The next prime is 155402089. The reversal of 155402073 is 370204551.

It is a happy number.

It is not a de Polignac number, because 155402073 - 2⁴ = 155402057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155402573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12811 + ... + 21792.

Almost surely, 2^155402073 is an apocalyptic number.

It is an amenable number.

155402073 is a deficient number, since it is larger than the sum of its proper divisors (69523927).

155402073 is a wasteful number, since it uses less digits than its factorization.

155402073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35108 (or 35105 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 155402073 is about 12466.0367799875. The cubic root of 155402073 is about 537.6326096457.

The spelling of 155402073 in words is "one hundred fifty-five million, four hundred two thousand, seventy-three".