145437731 has 4 divisors (see below), whose sum is σ = 145462464. Its totient is φ = 145413000.

The previous prime is 145437727. The next prime is 145437769. The reversal of 145437731 is 137734541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145437731 - 2² = 145437727 is a prime.

It is a super-2 number, since 2×145437731² = 42304267196856722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145437691 and 145437700.

It is not an unprimeable number, because it can be changed into a prime (145437781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2081 + ... + 17181.

It is an arithmetic number, because the mean of its divisors is an integer number (36365616).

Almost surely, 2^145437731 is an apocalyptic number.

145437731 is a deficient number, since it is larger than the sum of its proper divisors (24733).

145437731 is an equidigital number, since it uses as much as digits as its factorization.

145437731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24732.

The product of its digits is 35280, while the sum is 35.

The square root of 145437731 is about 12059.7566725038. The cubic root of 145437731 is about 525.8869132379.

The spelling of 145437731 in words is "one hundred forty-five million, four hundred thirty-seven thousand, seven hundred thirty-one".