145402 has 4 divisors (see below), whose sum is σ = 218106. Its totient is φ = 72700.

The previous prime is 145399. The next prime is 145417. The reversal of 145402 is 204541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204541 = 137 ⋅1493.

It can be written as a sum of positive squares in only one way, i.e., 123201 + 22201 = 351^2 + 149^2 .

It is a super-2 number, since 2×145402² = 42283483208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36349 + ... + 36352.

2¹⁴⁵⁴⁰² is an apocalyptic number.

145402 is a deficient number, since it is larger than the sum of its proper divisors (72704).

145402 is an equidigital number, since it uses as much as digits as its factorization.

145402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72703.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 145402 is about 381.3161418036. The cubic root of 145402 is about 52.5843843249.

Adding to 145402 its reverse (204541), we get a palindrome (349943).

The spelling of 145402 in words is "one hundred forty-five thousand, four hundred two".