149752457 has 4 divisors (see below), whose sum is σ = 149874756. Its totient is φ = 149630160.

The previous prime is 149752453. The next prime is 149752469. The reversal of 149752457 is 754257941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754257941 = 241 ⋅3129701.

It can be written as a sum of positive squares in 2 ways, for example, as 111175936 + 38576521 = 10544^2 + 6211^2 .

It is a cyclic number.

It is not a de Polignac number, because 149752457 - 2² = 149752453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149752453) 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, 59294 + ... + 61767.

It is an arithmetic number, because the mean of its divisors is an integer number (37468689).

Almost surely, 2^149752457 is an apocalyptic number.

It is an amenable number.

149752457 is a deficient number, since it is larger than the sum of its proper divisors (122299).

149752457 is a wasteful number, since it uses less digits than its factorization.

149752457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122298.

The product of its digits is 352800, while the sum is 44.

The square root of 149752457 is about 12237.3386404071. The cubic root of 149752457 is about 531.0368417828.

The spelling of 149752457 in words is "one hundred forty-nine million, seven hundred fifty-two thousand, four hundred fifty-seven".