155142870 has 16 divisors (see below), whose sum is σ = 372342960. Its totient is φ = 41371424.

The previous prime is 155142863. The next prime is 155142877. The reversal of 155142870 is 78241551.

It is an interprime number because it is at equal distance from previous prime (155142863) and next prime (155142877).

It is a super-2 number, since 2×155142870² = 48138620223673800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155142877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2585685 + ... + 2585744.

It is an arithmetic number, because the mean of its divisors is an integer number (23271435).

Almost surely, 2^155142870 is an apocalyptic number.

155142870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155142870 is an abundant number, since it is smaller than the sum of its proper divisors (217200090).

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

155142870 is a wasteful number, since it uses less digits than its factorization.

155142870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171439.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 155142870 is about 12455.6360736817. The cubic root of 155142870 is about 537.3335283998. Note that the first 3 decimals are identical.

The spelling of 155142870 in words is "one hundred fifty-five million, one hundred forty-two thousand, eight hundred seventy".