155901942 has 128 divisors (see below), whose sum is σ = 414996480. Its totient is φ = 42456960.

The previous prime is 155901881. The next prime is 155901943. The reversal of 155901942 is 249109551.

155901942 is a `hidden beast` number, since 15 + 590 + 19 + 42 = 666.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 155901897 and 155901906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155901943) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 992928 + ... + 993084.

It is an arithmetic number, because the mean of its divisors is an integer number (3242160).

Almost surely, 2^155901942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155901942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207498240).

155901942 is an abundant number, since it is smaller than the sum of its proper divisors (259094538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155901942 is a wasteful number, since it uses less digits than its factorization.

155901942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 155901942 is about 12486.0699181127. The cubic root of 155901942 is about 538.2084454603.

The spelling of 155901942 in words is "one hundred fifty-five million, nine hundred one thousand, nine hundred forty-two".