1451202139 has 4 divisors (see below), whose sum is σ = 1474992400. Its totient is φ = 1427411880.

The previous prime is 1451202133. The next prime is 1451202167. The reversal of 1451202139 is 9312021541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9312021541 = 17 ⋅547765973.

It is a cyclic number.

It is not a de Polignac number, because 1451202139 - 2³ = 1451202131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1451202131) 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, 11895039 + ... + 11895160.

It is an arithmetic number, because the mean of its divisors is an integer number (368748100).

Almost surely, 2^1451202139 is an apocalyptic number.

1451202139 is a deficient number, since it is larger than the sum of its proper divisors (23790261).

1451202139 is an equidigital number, since it uses as much as digits as its factorization.

1451202139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23790260.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1451202139 is about 38094.6471174101. The cubic root of 1451202139 is about 1132.1639009329.

The spelling of 1451202139 in words is "one billion, four hundred fifty-one million, two hundred two thousand, one hundred thirty-nine".