155247642 has 48 divisors (see below), whose sum is σ = 367791840. Its totient is φ = 46936800.

The previous prime is 155247637. The next prime is 155247647. The reversal of 155247642 is 246742551.

It is a happy number.

155247642 is a `hidden beast` number, since 1 + 5 + 5 + 2 + 4 + 7 + 642 = 666.

It is an interprime number because it is at equal distance from previous prime (155247637) and next prime (155247647).

It is a junction number, because it is equal to n+sod(n) for n = 155247597 and 155247606.

It is not an unprimeable number, because it can be changed into a prime (155247647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145792 + ... + 146852.

It is an arithmetic number, because the mean of its divisors is an integer number (7662330).

Almost surely, 2^155247642 is an apocalyptic number.

155247642 is an abundant number, since it is smaller than the sum of its proper divisors (212544198).

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

155247642 is a wasteful number, since it uses less digits than its factorization.

155247642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819 (or 1816 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 155247642 is about 12459.8411707373. The cubic root of 155247642 is about 537.4544595994.

It can be divided in two parts, 1552 and 47642, that added together give a palindrome (49194).

The spelling of 155247642 in words is "one hundred fifty-five million, two hundred forty-seven thousand, six hundred forty-two".