155412340 has 12 divisors (see below), whose sum is σ = 326365956. Its totient is φ = 62164928.

The previous prime is 155412319. The next prime is 155412349. The reversal of 155412340 is 43214551.

It is a happy number.

155412340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 99880036 + 55532304 = 9994^2 + 7452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155412349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3885289 + ... + 3885328.

It is an arithmetic number, because the mean of its divisors is an integer number (27197163).

Almost surely, 2^155412340 is an apocalyptic number.

155412340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155412340 is an abundant number, since it is smaller than the sum of its proper divisors (170953616).

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

155412340 is a wasteful number, since it uses less digits than its factorization.

155412340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7770626 (or 7770624 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 155412340 is about 12466.4485720673. The cubic root of 155412340 is about 537.6444493686.

Adding to 155412340 its reverse (43214551), we get a palindrome (198626891).

The spelling of 155412340 in words is "one hundred fifty-five million, four hundred twelve thousand, three hundred forty".