145257642 has 24 divisors (see below), whose sum is σ = 315730116. Its totient is φ = 48264576.

The previous prime is 145257617. The next prime is 145257643. The reversal of 145257642 is 246752541.

It is a happy number.

145257642 is a `hidden beast` number, since 1 + 4 + 5 + 2 + 5 + 7 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 100220121 + 45037521 = 10011^2 + 6711^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145257597 and 145257606.

It is not an unprimeable number, because it can be changed into a prime (145257643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7023 + ... + 18434.

Almost surely, 2^145257642 is an apocalyptic number.

145257642 is an abundant number, since it is smaller than the sum of its proper divisors (170472474).

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

145257642 is a wasteful number, since it uses less digits than its factorization.

145257642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25782 (or 25779 counting only the distinct ones).

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

The square root of 145257642 is about 12052.2878326067. The cubic root of 145257642 is about 525.6697628812.

The spelling of 145257642 in words is "one hundred forty-five million, two hundred fifty-seven thousand, six hundred forty-two".