151391249 has 4 divisors (see below), whose sum is σ = 151448100. Its totient is φ = 151334400.

The previous prime is 151391243. The next prime is 151391291. The reversal of 151391249 is 942193151.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 122500624 + 28890625 = 11068^2 + 5375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151391249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151391243) 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, 24224 + ... + 29825.

It is an arithmetic number, because the mean of its divisors is an integer number (37862025).

Almost surely, 2^151391249 is an apocalyptic number.

It is an amenable number.

151391249 is a deficient number, since it is larger than the sum of its proper divisors (56851).

151391249 is an equidigital number, since it uses as much as digits as its factorization.

151391249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56850.

The product of its digits is 9720, while the sum is 35.

The square root of 151391249 is about 12304.1151246240. The cubic root of 151391249 is about 532.9669238052.

The spelling of 151391249 in words is "one hundred fifty-one million, three hundred ninety-one thousand, two hundred forty-nine".