145631142 has 16 divisors (see below), whose sum is σ = 323624880. Its totient is φ = 48543696.

The previous prime is 145631119. The next prime is 145631183. The reversal of 145631142 is 241136541.

It is a happy number.

145631142 is a `hidden beast` number, since 14 + 5 + 631 + 14 + 2 = 666.

145631142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1348383 + ... + 1348490.

It is an arithmetic number, because the mean of its divisors is an integer number (20226555).

Almost surely, 2^145631142 is an apocalyptic number.

145631142 is an abundant number, since it is smaller than the sum of its proper divisors (177993738).

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

145631142 is a wasteful number, since it uses less digits than its factorization.

145631142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696884 (or 2696878 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 145631142 is about 12067.7728682636. The cubic root of 145631142 is about 526.1199276440.

Adding to 145631142 its reverse (241136541), we get a palindrome (386767683).

The spelling of 145631142 in words is "one hundred forty-five million, six hundred thirty-one thousand, one hundred forty-two".