145402131 has 8 divisors (see below), whose sum is σ = 221565184. Its totient is φ = 83086920.

The previous prime is 145402123. The next prime is 145402133. The reversal of 145402131 is 131204541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145402131 - 2³ = 145402123 is a prime.

It is a super-2 number, since 2×145402131² = 42283559398682322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 6923911 = 145402131 / (1 + 4 + 5 + 4 + 0 + 2 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145402098 and 145402107.

It is not an unprimeable number, because it can be changed into a prime (145402133) 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, 3461935 + ... + 3461976.

It is an arithmetic number, because the mean of its divisors is an integer number (27695648).

Almost surely, 2^145402131 is an apocalyptic number.

145402131 is a deficient number, since it is larger than the sum of its proper divisors (76163053).

145402131 is an equidigital number, since it uses as much as digits as its factorization.

145402131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6923921.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 145402131 is about 12058.2805988250. The cubic root of 145402131 is about 525.8440011688.

Adding to 145402131 its reverse (131204541), we get a palindrome (276606672).

The spelling of 145402131 in words is "one hundred forty-five million, four hundred two thousand, one hundred thirty-one".